Power wise not loads but loads more £££££££'s for being light weight and better brakes and paddle shift etc...............the new M3 yes has more grunt but because of the extra weight of the engine (V8!) its not that much quicker on a tract but in real life situ yeah it will leave the 46.

I know of a few guys over in europe who have the older 330d in the 400+hp region as that straight 6 lump with common rail diesel injection is so tunable........it comes down to being able to get a hold of large enough injectors as you start to run out of fuel especially when using sequential twins .