Originally Posted by aus
Everything on Roundel for the last few months has said the next M3 will have a turbo I6. It'd also been said BMW believes the ideal cylinder size to be 0.5L; thus is especially true for the M division, but who knows with Segler running the show now.
Audi has a 400 hp 2.5L turbo I-5 in their Quattro Coupe concept. I predict a 475 hp turbo I-7 in the M3!