Originally Posted by conradb
I'm going to highly doubt that the M3 would share an engine with a freakin X3M, let alone that BMW will ever produce an X3M.
The new M5 shares the same engine as the X5 M and X6 M. No doubt the new M6 will share that powerplant as well.
The 1M already shares the same engine as the -35i cars.
The M3 will most likely share as well