General Car Conversation
GLE 350
2.0T I4
255hp
19/27
4608lbs
X5 40i
3.0T I6
335hp
21/25
4828lbs
Lead Lap
Joined: Nov 2006
Posts: 4,585
Likes: 24
From: Washington
I'd wager it's because base to base the 2.0 in the Mercedes has to work harder, and the X5 40i with the B58 I6 is about as good as an I6 out there for both performance and efficiency (even more so in the M340i). Officially by the numbers the BMW wins in the city and the Mercedes on the highway. More impressive is the BMW is 200lbs heavier and is within 2 mpg. In real world though you could definitely get mid to high 20's on the highway especially in Eco Mode.
GLE 350
2.0T I4
255hp
19/27
4608lbs
X5 40i
3.0T I6
335hp
21/25
4828lbs
GLE 350
2.0T I4
255hp
19/27
4608lbs
X5 40i
3.0T I6
335hp
21/25
4828lbs
Lexus Champion
Joined: Apr 2019
Posts: 11,196
Likes: 1,582
From: FL
Racer
Joined: Jan 2019
Posts: 1,348
Likes: 262
From: Sofia
I'd wager it's because base to base the 2.0 in the Mercedes has to work harder, and the X5 40i with the B58 I6 is about as good as an I6 out there for both performance and efficiency (even more so in the M340i). Officially by the numbers the BMW wins in the city and the Mercedes on the highway. More impressive is the BMW is 200lbs heavier and is within 2 mpg. In real world though you could definitely get mid to high 20's on the highway especially in Eco Mode.
Not a problem. Most german engines failures tend to be for a variety of reasons not related to block/piston/rod/crank failure. Turbos are consumables, chains are... a weird story with these.
Lexus Champion
Joined: Oct 2019
Posts: 18,096
Likes: 1,740
From: Ohio
Perhaps you can share BSFC figures to back that claim?
Just tested:
Grade: 22.7%
Altitude: 732m min, 749m max
Distance: 3.644km
GPS Speed: 149km/h constant (cruise control), ~92.5mph
RPM: 2187rpm (avg), 2510rpm (max)
Power: 54.13kw (avg), 63.46kw (max)
No SoC change (read: no power going out of the battery). Outside temp 29C, AC set to 24.
4000rpm is around 125kw sustained power output. This car does not generally see >2000rpm during steady state cruising on the highway, unless traffic allows for such speed and I'm in the hilly section.
Aerodynamics:
https://www.automobile-catalog.com/c...i_quattro.html
https://www.automobile-catalog.com/c...s_gs_450h.html
both claimed 0.27 cd/m2, slightly larger cross section on the A8.
Still not convinced that any such car does 29mpg (~8.11l/km) at 90mph (~145kph).
Just tested:
Grade: 22.7%
Altitude: 732m min, 749m max
Distance: 3.644km
GPS Speed: 149km/h constant (cruise control), ~92.5mph
RPM: 2187rpm (avg), 2510rpm (max)
Power: 54.13kw (avg), 63.46kw (max)
No SoC change (read: no power going out of the battery). Outside temp 29C, AC set to 24.
4000rpm is around 125kw sustained power output. This car does not generally see >2000rpm during steady state cruising on the highway, unless traffic allows for such speed and I'm in the hilly section.
Aerodynamics:
https://www.automobile-catalog.com/c...i_quattro.html
https://www.automobile-catalog.com/c...s_gs_450h.html
both claimed 0.27 cd/m2, slightly larger cross section on the A8.
Still not convinced that any such car does 29mpg (~8.11l/km) at 90mph (~145kph).
As stated by others here and myself they do get that IRL. I don't have to prove it to you past what I already provided since that's what the cars I drive get me.
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Thread Starter
Lexus Fanatic
Joined: May 2012
Posts: 68,468
Likes: 3,991
From: Maryland
Racer
Joined: Jan 2019
Posts: 1,348
Likes: 262
From: Sofia
Doesn't matter what engine configuration it is so long as it consumes the same amount of fuel for a given amount of work.
Lexus Champion
Joined: Jan 2012
Posts: 17,021
Likes: 496
From: Knoxville, TN
Lexus Fanatic
Joined: Nov 2011
Posts: 35,383
Likes: 357
From: ON/NY
Lexus Fanatic
Joined: Nov 2011
Posts: 35,383
Likes: 357
From: ON/NY
At high speeds, all these engines should be in their efficiency sweet spot. Big engines can't get there at low speeds. Small engines "drastically" increase their fuel consumption at high speeds since... well, the load increases equally "drastically".
Doesn't matter what engine configuration it is so long as it consumes the same amount of fuel for a given amount of work.
Doesn't matter what engine configuration it is so long as it consumes the same amount of fuel for a given amount of work.
Last edited by Toys4RJill; Jul 27, 2022 at 12:30 PM.
Racer
Joined: Jan 2019
Posts: 1,348
Likes: 262
From: Sofia
Engine tuning is exactly what I described with the fuel per work measurement. https://en.wikipedia.org/wiki/Brake-...el_consumption