Originally Posted by ksfrogman
I'm confused. Why not? The e46 M3 is mass produced. If the e90 M3 will have an entirely new engine with more HP, why not use the previous M3 motor in an e90 sedan?
not mass produced as the E90 is.
it would be a grave insult to M car owners if their engine suddenly appears in a regular BMW car.
besides the engine is not suited for just starting and going as well. Also i would assume the motor is more expensive to produce than the regular N52.