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Official: Porsche 918 Spyder

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Old 05-16-13, 03:27 PM   #1
Hoovey2411
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Default Official: Porsche 918 Spyder

Porsche 918 Spyder shows its production body


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INTRODUCING THE PORSCHE 918 SPYDER

Atlanta.The 918 Spyder embodies the essence of the Porsche idea: it combines pedigree motor racing technology with excellent everyday utility, and maximum performance with minimum consumption. The task faced by the development team was to create the super sports car for the next decade with a highly efficient and powerful hybrid drive. Developing the car from scratch, appropriately beginning with a sheet of white paper, allowed the team to come up with a no-compromise concept. The entire car was designed around the hybrid drive. The 918 Spyder therefore demonstrates the potential of the hybrid drive to a degree never seen before: the parallel improvement of both efficiency and performance without one being at the cost of the other. This is the idea that has made the Porsche 911 the most successful sports car in the world for 50 years. In short, the 918 Spyder will act as the gene pool for the Porsche sports cars of the future.

The 918 Spyder reveals its close links to motorsport in a variety of ways. It has been designed, developed and produced by Porsche engineers who build race cars, in cooperation with series production specialists. A great deal of insight gained from the development of Porsche race cars for the 24 hours race in Le Mans in 2014 is thus integrated into the 918 Spyder – and vice versa. The structural concept of the 918 Spyder with a rolling chassis as its basis – a basic vehicle that can be driven even without a body – is race car tradition at Porsche. The concept of the V8 engine originates from the LMP2 RS Spyder race car. The load-bearing structures, the monocoque and subframe, are made of carbon fiber reinforced polymer. Porsche has many years of experience with this high-strength, lightweight construction material and has again achieved top results with the development of the series production 918 Spyder. Many parts of the super sports car come from manufacturers who have a proven record as suppliers for motorsport vehicles.

Hybrid drive brings advantages in terms of driving dynamics

A key message of the 918 Spyder is that the hybrid drive from Porsche is a plus for no-compromise driving dynamics. Drivers can experience this thanks to the unique all-wheel drive concept with a combination of combustion engine and electric motor on the rear axle and the second electric motor on the front axle. It is based on knowledge gained by Porsche during motor races with the successful 911 GT3 R Hybrid. Due to the additional, individually controllable front drive, new driving strategies for extremely high, safe cornering speeds can be implemented, especially for bends. Furthermore, the advanced "boost" strategy manages the energy of the electric drive so intelligently that, for every sprint with maximum acceleration, the full power of the 918 Spyder can be tapped into by simply pressing the accelerator down fully. In short, the 918 Spyder allows even drivers without motorsport training to experience the potential of advanced longitudinal and transverse dynamics.

The Porsche 918 Spyder also has the potential to break many records. The current lap time for the North Loop of the Nürburgring is 7:14 minutes. This time was achieved in the presence of international journalists during test drives in September 2012 – more than a year before start of production. The 918 Spyder prototype was therefore approximately 20 seconds quicker than the Porsche Carrera GT. More test drives on the Nürburgring North Loop will follow. An even more important factor is that the 918 Spyder surpasses previous models and competitors by far in its efficiency as well. As a plug-in hybrid vehicle, it systematically combines the dynamic performance of a racing machine with low fuel consumption. To sum it up: maximum driving fun with minimal fuel consumption.

Carbon monocoque guarantees lightweight design with a low center of gravity

The 918 Spyder utilizes the best state-of-the-art technologies, taken straight from motor racing, to achieve its top performance. The entire load-bearing structure is made of carbon fiber reinforced polymer (CFRP) for extreme torsional rigidity. Additional crash elements at the front and rear absorb and reduce the energy of a collision. The car's unladen weight of approximately 3,715 lbs. (3,616 lbs. with "Weissach" package), an excellent low weight for a hybrid vehicle of this performance class, is largely attributable to this concept.

The drivetrain components and all components weighing over 110 lbs. are located as low and as centrally as possible within the vehicle. This results in a slightly rear end biased axle load distribution of 57 percent on the rear axle and 43 percent on the front axle, combined with an extremely low center of gravity at approximately the height of the wheel hubs, which is ideal for driving dynamics. The central and low position of the traction battery directly behind the driver not only supports efforts to concentrate masses and lower the center of gravity; it also provides the best temperature conditions for optimum battery power capacity.

Chassis with race car genes and rear-axle steering

The multi-link chassis of the Porsche 918 Spyder is inspired by motorsport design, complemented by additional systems such as the PASM adaptive shock-absorber system and rear-axle steering. Basically, this incorporates an electro-mechanical adjustment system at each rear wheel. The adjustment is speed-sensitive and executes steering angles of up to three degrees in each direction. The rear axle can therefore be steered in the same direction as the front wheels or in opposition to them. At low speeds, the system steers the rear wheels in a direction opposite to that of the front wheels. This makes cornering even more direct, faster and more precise, and it reduces the turning circle. At higher speeds, the system steers the rear wheels in the same direction as the front wheels. This significantly improves the stability of the rear end when changing lanes quickly. The result is very secure and stable handling.

Porsche Active Aerodynamic (PAA) for different driving modes

Porsche Active Aerodynamic (PAA), a system of adjustable aerodynamic elements, ensures unique and variable aerodynamics; its layout is automatically varied over three modes ranging from optimal efficiency to maximum downforce and is tuned to the operating modes of the hybrid drive system. In "Race" mode, the retractable rear wing is set to a steep angle to generate high downforce at the rear axle. The spoiler positioned between the two wing supports near the trailing edge of the airflow also extends. In addition, two adjustable air flaps are opened in the underfloor in front of the front axle, and they direct a portion of the air into the diffuser channels of the underbody structure. This also produces a "ground effect" at the front axle.

In "Sport" mode, the aerodynamic control system reduces the attack angle of the rear wing somewhat, which enables a higher top speed. The spoiler remains extended. The aerodynamic flaps in the underfloor area close, which also reduces aerodynamic drag and increases attainable vehicle speeds. In "E" mode, the control is configured entirely for low aerodynamic drag; the rear wing and spoiler are retracted and the underfloor flaps are closed.

Adjustable air inlets under the main headlights round off the adaptive aerodynamic system. When the vehicle is stationary and in "Race" and "Sport" mode, they are opened for maximum cooling air intake. In "E-Power" and "Hybrid" modes, they close immediately after the car is driven off in order to keep aerodynamic drag to a minimum. They are not opened until the car reaches speeds of approximately 81 mph or when cooling requirements are higher.

From comfortable to race-ready: five modes for three motors

The core of the 918 Spyder concept is its distribution of propulsive power among the three power units; their cooperation is controlled by an intelligent management system. To best exploit these different approaches, the Porsche developers defined five operating modes that can be activated via a "map switch" on the steering wheel, just like in motorsport cars. On the basis of this pre-selection, the 918 Spyder applies the most suitable operating and boost strategy without driver intervention, thus allowing the driver to concentrate fully on the road.

Quiet and elegant: "E-Power"

When the vehicle is started up, the "E-Power" mode is the default operating mode as long as the battery is sufficiently charged. In ideal conditions, the 918 Spyder can cover approximately 18 miles on purely electric power. Even in pure electric mode, the 918 Spyder accelerates from 0 to 62 mph in seven seconds and can reach speeds of up to 93 mph. In this mode, the combustion engine is only used when needed. If the battery's charge state drops below a set minimum value, the vehicle automatically switches to hybrid mode.

Efficient and comfortable: "Hybrid"

In "Hybrid" mode, the electric motors and combustion engine work alternately with a focus on maximum efficiency and minimum fuel consumption. The use of individual drive components is modified as a function of the current driving situation and the desired performance. The Hybrid mode is typically used for a fuel economy-oriented driving style.

Sporty and dynamic: "Sport Hybrid"

In more dynamic situations, the 918 Spyder selects the "Sport Hybrid" mode for its power sources. The combustion engine now operates continuously and provides the main propulsive force. In addition, the electric motors provide support in the form of electric boosting or when the operating point of the combustion engine can be optimized for greater efficiency. The focus of this mode is on performance and a sporty driving style at top speed.

For fast laps: "Race Hybrid"

"Race Hybrid" is the mode for maximum performance and an especially sporty driving style. The combustion engine is chiefly used under high load, and charges the battery when the driver is not utilizing its maximum output. Again, the electric motors provide additional support in the form of boosting. Furthermore, the gear-shifting program of the PDK is set up for even sportier driving. The electric motors are used up to the maximum power output limit to deliver the best possible performance for the race track. In this mode, the battery charge state is not kept constant, rather it fluctuates over the entire charge range. In contrast to Sport Hybrid mode, the electric motors run at their maximum power output limit for a short time for better boosting. This increased output is balanced by the combustion engine charging the battery more intensively. Electric power is thus available even with several very fast laps.

For pole position: "Hot Lap"

The "Hot Lap" button in the middle of the map switch releases the final reserves of the 918 Spyder and can only be activated in "Race Hybrid" mode. Similar to a qualification mode, this pushes the traction battery to its maximum power output limits for a few fast laps. This mode uses all of the available energy in the battery.

Main propulsion: the race car's eight cylinder engine

The main source of propulsion is the 4.6-liter, eight cylinder engine that produces 608 hp of power. The engine is derived directly from the power unit of the successful RS Spyder, which explains why it can deliver engine speeds of up to 9,150 rpm. Like the race engine of the RS Spyder, the 918 Spyder power unit features dry-sump lubrication with a separate oil tank and oil extraction. To save weight, components such as the oil tank, the air filter box integrated into the subframe and the air induction are made of carbon fiber reinforced polymer. Further extensive lightweight design measures have resulted in such features as titanium connecting rods, thin-wall, low-pressure casting on the crank case and the cylinder heads, a high-strength, lightweight steel crankshaft with 180 degrees crankpin offset and the extremely thin-walled alloy steel/nickel exhaust system. Striking features of the V8 are that it no longer supports any auxiliary systems, there are no external belt drives and the engine is therefore particularly compact. Weight and performance optimizations achieve a power output per liter of approx. 133 hp/l – the highest power output per liter of a Porsche naturally aspirated engine – which is significantly higher than that of the Carrera GT (106 hp/l) and outstanding for a naturally aspirated engine.

Unique race car design heritage: top pipes

It isn't just this engine's performance but also the sound it makes that stokes the emotionality of the 918 Spyder. This is attributable first and foremost to the so-called top pipes: the tailpipes terminate in the upper part of the rear end immediately above the engine. No other production vehicle uses this solution. The top pipes' greatest benefit is optimal heat removal, because the hot exhaust gases are released via the shortest possible route, and exhaust gas back pressure remains low. This design requires a new thermodynamic air channeling concept. With the HSI engine, the hot side is located inside the cylinder V, the intake channels are on the outside. There is another benefit as well: the engine compartment remains cooler. This is especially beneficial to the lithium-ion traction battery, as it provides optimum performance at temperatures between 68 and 104 degrees Fahrenheit. Consequently, less energy needs to be used for active cooling of the battery.

In parallel in the drivetrain: hybrid module

The V8 engine is coupled to the hybrid module, since the 918 Spyder is designed as a parallel hybrid like the current hybrid models from Porsche. Essentially, the hybrid module comprises a 115 kW electric motor and a decoupler that serves as the connection with the combustion engine. Because of its parallel hybrid configuration, the 918 Spyder can be powered at the rear axle either individually by the combustion engine or electric motor or via both drives jointly. As is typical for a Porsche super sports car, the power pack in the 918 Spyder has been placed in front of the rear axle, and does not have any direct mechanical connection to the front axle.

Upside-down for a low center of gravity: Doppelkupplung

A seven-speed Doppelkupplung (PDK) transmission handles power transmission to the rear axle. The high-performance transmission is the sportiest version of the successful PDK; it has undergone a complete redesign for the 918 Spyder and has been further optimized for high performance. To ensure a low mounting position for a low center of gravity of the entire vehicle, the gear unit was turned "upside down" by rotating it 180 degrees about its longitudinal axis, in contrast to other Porsche series. If no power is required on the rear axle, the two motors can be decoupled by opening the decoupler and PDK clutches. This is the action behind the Porsche hybrid drive's typical "coasting" with the combustion engine switched off.

Independent all-wheel drive: front axle with electric motor

On the front axle, there is another independent electric motor with an output of approximately 95 kW. The front electric drive unit drives the wheels at a fixed ratio. A decoupler decouples the electric motor at high speeds to prevent the motor from over-revving. Drive torque is independently controlled for each axle. This makes for very responsive all-wheel drive functionality that offers great potential in terms of traction and driving dynamics.

Lithium-ion battery with plug-in charging system

The electric energy for the electric motors is stored by a liquid-cooled lithium-ion battery comprising 312 individual cells with an energy content of about seven kilowatt hours. The battery of the 918 Spyder has a performance-oriented design in terms of both power charging and output, so that it can fulfill the performance requirements of the electric motor. The power capacity and the operating life of the lithium-ion traction battery depend on several factors, including thermal conditions. That is why the battery of the 918 Spyder is liquid-cooled by a dedicated cooling circuit. The global warranty period for the traction battery is seven years.

To supply it with energy, Porsche developed a new system with a plug-in vehicle charge port and improved recuperation potential. This vehicle charge port in the B-pillar on the front passenger side lets users connect the storage battery to an electrical supply at home to charge it. The charge port is standardized for the country of purchase. The on-board charger is located close to the traction battery. It converts the alternating current of the household electric supply into direct current with a maximum charge output of 3.6 kW. Using the supplied Porsche Universal Charger (AC), the traction battery can be charged with a conventional wall plug in seven hours from a ten ampere rated, fused power socket a US 110 Volt household electrical supply, for example. Furthermore, the Porsche Universal Charger (AC) can be installed at home in the garage using the Charging Dock. It enables rapid and convenient charging within approximately two hours, irrespective of regional conditions. The Porsche Speed Charging Station (DC) is available as an optional extra. It can fully charge the high-voltage battery of the 918 Spyder in just 25 minutes.

Pioneering control concept: clear organization of the cockpit

The driver is the focus of all technology in the future Porsche super sports car. A cockpit was created for the driver that is typical of the brand and pioneering in its clarity. It is partitioned into two basic areas. First, there are the controls that are important for driving, which are grouped around the multifunction steering wheel, combined with driver information displayed on three large round instruments. Second, there is the infotainment block that is housed in the lifted center console, which was introduced in the Carrera GT. Control functions, e.g. for the automatic climate control system, wing adjustment, lighting and Porsche Communication Management (PCM), including a Burmester high-end sound system, can be intuitively operated by multitouch with a new type of black panel technology.

For even higher performance: the Weissach package

For very performance-oriented customers of the 918 Spyder, Porsche offers the "Weissach" package. These modified super sports cars can be recognized at first glance by special colors and designs that are based on legendary Porsche race cars. The roof, rear wings, rear-view mirrors and frames of the windscreen are made of visible carbon. Parts of the interior are upholstered with Alcantara instead of leather, and visible carbon replaces much of the aluminum. Sound insulation has been reduced. The emphasis on performance is not just visual: very lightweight magnesium wheels reduce unsprung masses; gross weight was reduced by about 77 lbs. The benefits are experienced in further improved dynamic performance. Other references from motorsport are six-point seatbelts for driver and front passenger, optional film-coating instead of body paint, as well as additional aerodynamic body parts in visible carbon.

Porsche redefined: a new super sports car for a new decade

The 918 Spyder continues a long tradition of super sports cars at Porsche; as technology platforms, as the driving force behind both car emotion and car evolution and as the ultimate sports cars of their decades: the Carrera GTS, the first Porsche Turbo, the 959, the 911 GT1, the Carrera GT. More than any of its predecessors, the 918 Spyder is providing key impetus for developing technologies for future vehicle concepts. It offers a complete package of components that reflect Porsche DNA – more concentrated than ever before.

Technical Specifications – Porsche 918 Spyder

Body: Two-seat Spyder; carbon fiber reinforced plastics (CFRP) monocoque interlocked with CFRP unit carrier; two-piece Targa roof; fixed roll-over protection system.

Drivetrain: Parallel full hybrid; 4.6-liter V8 mid-engine with dry-sump lubrication; hybrid module with electric motor and decoupler; electric motor with decoupler and gear unit on front axle; auto start/stop function; electrical system recuperation; four cooling circuits for motors, transmission and battery; thermal management.

Engine power: 608 hp at 8,600/min (V8 engine)

154 hp (hybrid module on rear axle)

127 hp (electric motor on front axle)

887 hp (combined)

Max. torque: 390 lb.-ft. at 6,600/min (V8 engine)

940 lb.-ft. (equivalent torque calculated on the crankshaft, complete system in 7th gear)

787 lb.-ft. (complete system, 3rd gear)

> 590 lb.-ft. (800/min – 5,000/min)

Maximum Revs: 9,150 rpm

Power output per l: 133 hp/l (V8 engine)

Power transmission: Combustion engine with hybrid module and transmission bolted together to form a single drive unit; seven-speed Doppelkupplungsgetriebe (PDK); rear-wheel drive; front electric motor with gearbox for driving the front wheels (decoupled from 146 mph); five pre-selectable operating modes for optimum coordination of all drive units.

Gear ratios PDK

1st gear 3.91

2nd gear 2.29

3rd gear 1.58

4th gear 1.19

5th gear 0.97

6th gear 0.83

7th gear 0.67

R gear 3.55

Final drive ratio 3.09

Clutch diameter 8.7 in. / 6.5 in.

Chassis and Suspension: Double-wishbone front axle; optional electro-pneumatic lift system on front axle; electro-mechanical power steering; multilink rear axle with adaptive electro-mechanical system for individual rear wheel steering; electronically controlled twin-tube gas-pressure dampers in the front and rear with Porsche Active Suspension Management (PASM).

Brake system: High-performance hybrid brake system with adaptive recuperation; internally ventilated and perforated front ceramic brake discs (PCCB), 16 in. in diameter and 1.4 in. thick; rear discs 15.4 in diameter and 1.3 in. thick.

Wheels and tires: 918 Spyder wheels

(Weissach package: 918 Spyder magnesium wheels)

front 9.5 J x 20 with 265/35 ZR 20

rear 12.5 J x 21 with 325/30 ZR 21

Weights: Curb weight 3,715 lbs.

3,616 lbs. (Weissach package)

Dimensions: Length 182.8 in.

Width 76.4 in.

Height 45.9 in.

Wheelbase 107.5 in.

Track width front 65.5 in.

rear 63.5 in.

Luggage compartment capacity, VDA ~ 110 l

Fuel tank capacity 18.5 gal

Energy supply: Lithium-ion battery with 6.8 kWh capacity (BOL nominal), 220 kW maximum power and mains-compatible plug-in charger.

Performance: Top speed > 211 mph

purely electric 93 mph

Acceleration:

0-62 mph 2.8 s

0-60 mph less than 2.8 s

0-62 mph (in electric mode) 7.0 s

0-124 mph (0-200 km/h) 7.9 s

0-186 mph (0-300 km/h) 23.0 s

Range: Purely electric approx. 18 mi.

Warranty: Vehicle (Battery) 4 years (7 years)

Charging times:

AC charging on a household socket (110 V, 10 A): less than 7 hours

AC charging on an industrial socket (240 V, 30 A): less than 2 hours

DC charging on an industrial socket (400 V, 32 A): less than 0.5 hours.
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Old 05-17-13, 08:37 AM   #2
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Only Porsche could release a car that's barely a two-seater, with a full carbon fiber monocoque, 887 horsepower, über-exclusive (less than 1000 units to be made), price it at ~$845,000.00...

...and, with a straight, face, start the article off with the phrase "excellent everyday utility".
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Old 05-17-13, 09:11 AM   #3
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This is pure engineering madness.

**** the bean counters! I'm cheering for the engineers!!!
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Old 05-17-13, 11:18 AM   #4
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Originally Posted by Habious View Post
Only Porsche could release a car that's barely a two-seater, with a full carbon fiber monocoque, 887 horsepower, über-exclusive (less than 1000 units to be made), price it at ~$845,000.00...

...and, with a straight, face, start the article off with the phrase "excellent everyday utility".
Lol true
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Old 05-17-13, 11:46 AM   #5
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Can't wait for the Mclaren P1, Ferrari LaFerrari and Porsche 918 Spyder comparison
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Old 05-17-13, 12:02 PM   #6
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That front looks very Ferrari-ish to me...nevertheless, impressive!
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Old 05-18-13, 10:23 AM   #7
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Yawn. It looks bland and already outdated.
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Old 05-18-13, 12:43 PM   #8
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Originally Posted by PhilipMSPT View Post
This is pure engineering madness.

**** the bean counters! I'm cheering for the engineers!!!
post of the year!!!!!
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Old 05-18-13, 12:54 PM   #9
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Quote:
Originally Posted by Habious View Post
Only Porsche could release a car that's barely a two-seater, with a full carbon fiber monocoque, 887 horsepower, über-exclusive (less than 1000 units to be made), price it at ~$845,000.00...

...and, with a straight, face, start the article off with the phrase "excellent everyday utility".
Agreed. I also can't get over the fact that Porsche loves touting their RR layout in the 911 but whenever they make a supercar, it's MR.

That said, this is hybrid performance done the right way: engine behind the passenger compartment driving the rear wheels, hybrid driving the front wheels. Just like the GT3 R. And Toyota needs to get that MR2-based GRMN sports hybrid concept to market.

Hopefully we'll see some mass-market, affordable platforms available in the not-too-distant future.
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Old 05-18-13, 03:18 PM   #10
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Agreed. I also can't get over the fact that Porsche loves touting their RR layout in the 911 but whenever they make a supercar, it's MR.

That said, this is hybrid performance done the right way: engine behind the passenger compartment driving the rear wheels, hybrid driving the front wheels. Just like the GT3 R. And Toyota needs to get that MR2-based GRMN sports hybrid concept to market.

Hopefully we'll see some mass-market, affordable platforms available in the not-too-distant future.
If it wasn't RR it wouldn't be a 911
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Old 06-04-13, 07:52 AM   #11
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That interior is amazing........
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Old 06-04-13, 10:03 AM   #12
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looooks like a zonda
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Old 06-04-13, 11:23 AM   #13
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their hybrid options are interesting... something that could be used in any hybrid, I was talking about that for Lexus sporty hybrid in previous threads. Basically strong engine charge mode that recharges battery a lot more so you have electric power left for bursts of acceleration... of course, that means fuel mileage would be worse than without hybrid part, but hey, live a little :P.


"Concern" would be what happens when you deplete 18 miles plugin power and are left only on regeneration to get battery power.... you wont have that 280hp electric anymore... maybe 50-60hp max. Obviously, thats still 650hp, but essentially that big battery back is then simply a deadweight. If you are messing around German highway, you can kill that 6.8kWh battery in few minutes and then you are literally left with V8 and 3800 lbs, which isnt bad at all of course... just not million bucks.
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Old 06-04-13, 12:23 PM   #14
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Originally Posted by Hoovey2411 View Post
Can't wait for the Mclaren P1, Ferrari LaFerrari and Porsche 918 Spyder comparison
same here but the P1 and ferrari are both lighter and have more power than the porsche. personally, i think the 918 won't be able to keep up. did you see that youtube vid w/ chris harris? both the P1 and ferrari can get from 0-120 mph a lot quicker than the 918. like way faster.
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Old 06-04-13, 02:19 PM   #15
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Originally Posted by cremaster View Post
same here but the P1 and ferrari are both lighter and have more power than the porsche. personally, i think the 918 won't be able to keep up. did you see that youtube vid w/ chris harris? both the P1 and ferrari can get from 0-120 mph a lot quicker than the 918. like way faster.
Maybe so, but I'd still like to see that comparo. One thing Porsche does well is steering and handling, which despite the power advantage of the Ferrari and Mclaren could prove a good match on a track. No I haven't see that video yet. Link?
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Old 06-04-13, 02:19 PM
 
 
 
 
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