What car did you benchmark?

Biermann: The predecessor, first of all. That was our main benchmark. The target was to make the best M3 ever. Now we call the coupe the M4, but the job was to make the best M3.

Yaguchi: No benchmark. I don't care about the competitors. I want to create what I want, which is a really high-performance car offering driving pleasure to anybody, even regular drivers.

What is the best high-performance car out there today?

Biermann: That is a hard to answer question because I think we need to cut this in slices for segments, you know? But the best one would be the M1 successor -- if there were a successor.

Yaguchi: Porsche 911.

If you were to give the previous car a 10 on a scale of 1 to 10, with 10 being best, what number would you give the M4/RC F?

Biermann: Oh, that's a tough one. I mean, if it comes to lap times, speeds, overall acceleration, then we would be in a different league than the M1 successor. As a driver's car and driving involvement, it pretty much goes to a 10.

Yaguchi: The Porsche has different axis to measure. The 911 goes this direction and the RC F goes that direction. So, 10 score 911; 10 score RC F. Just different axis.

What are the five things about your car that you'd want people to know?

Biermann: First of all, to go on with the tradition of bringing race car technology onto the road. That's the job of the M3 and the M4. And there's a lot of race car concept in the new car. Then, our completely new engine, where we bring the high-revving aspects of the predecessor's naturally aspirated engine together with the efficiency and the performance of a modern -- very modern -- turbo engine. Then all the focus we put on the car regarding light weight. There's so much technological substance in the new M4, with carbon-fiber technology, like a carbon-fiber driveshaft, carbon-fiber roof. The trunklid inside layer is carbon fiber, so it's lighter, less weight than the predecessor. That's a very important statement. And then, for sure, the precision and the agility of the driving experience. We put a lot of effort into developing everything around the steering system -- the kinematics, the front axle, the rear axle, how they interact, and that was a big focus on the car. Last one is performance on a racetrack. This is not a pretender. Like all the M3s before, this a track car.

Yaguchi: First of all, styling -- the coupe design. And then the engine -- the new engine we're going to introduce. And then the handling, with a really rigid body. Then the fourth: electronic devices, which help not only just professional drivers, but those beginner drivers, who can drive really easily and enjoy. And last, everybody can be smiling when they drive the RC F.

What are your thoughts on the RC F/M4?

Biermann: I need to understand more about the technology [Lexus] put into it. If [RC F] is just another IS F with a big engine, that would not make a competitor to an M3. I can only imagine that, for their customers, [5.0-liter V-8 and eight-speed automatic] is the right way to go. That would definitely not be the right way to go for our customers. We have kind of a race car engine -- the character of our engine is almost like a race car engine. Very precise, although it's a turbo, but it's very responsive and it revs up to 7600 rpm. Very sharp. And it's a car for the track.

Yaguchi: It's kind of typical M product, which means they don't change horsepower quite a lot, but they just reduced the weight to enhance the driving performance—the typical M way. So, that's my observation. At this moment, for Lexus F, we think the non-turbo engine provides the best performance balance and also response. But I don't want to reject any performance engine's potential. If needed, I'm going to certainly study. I want to provide linear torque and power by a naturally aspirated engine.

At this moment, for Lexus F, we think the non-turbo engine provides the best performance balance and also response. But I don't want to reject any performance engine's potential. If needed, I'm going to certainly study. I want to provide linear torque and power by a naturally aspirated engine.