The new M3 and M4 have ditched the big 4,0liter V8s from the previous generation and have saved a whole lot of CO2 ratings from the M cars. 200g/km from 290g/km. But no more V8 woofle. But I suppose we get a tradition sticking Straight-Six from the good ol' pre-V8 days of the 1980s and early 1990s.
These photos have been leaked ahead of its offcial launch sometime soon. B But I guess its an intentional leak. Viral marketing at work here folks.