Originally Posted by REP1KRR
Assuming 420, I show 87hp increase over the old M3, and 120 over the current twin-turbocharged 3.0-liter 335i. No?
Yes and no. Euro M3 is 343 HP, Euro 335 306HP. So +77 and +114 is right for Europe. Your numbers anyway are right for the US.
Best regards, south
EDIT: You're to fast, Romo