Interesting article found on 335i. This may give us clues on the M3 Horsepower numbers and performance numbers BMW will have to hit to offer proper model seperation between 335i and M3. I think we are all assuming the new M3 will quite a bit faster than the 335i under any condition and the 335i is not going to make that easy.
http://www.automobilemag.com/feature...i_dynamometer/