Originally Posted by GammaZeta
M's have a history of having their own engine (S14, S52, S54, etc.).
So your thought is to be an M car, it can't share an engine with any of the other regular BMW's?
I think that's a pretty valid point.
pretty much yes
all M engines were based on regular BMW engines
but were then enhanced, fine tuned, strengthened etc
this was was basically the same engine as the one in the 335is, but with a sticker on top
there is a reason why the car took only 6 months to develop
as you said it, parts bin car