Originally Posted by BLITZ
Why are people so surprised it fits. The engine bay in the Z3 is quite big. Its been done in E30's before.
Well don't forget the transmission that mates up to that V12 isn't exactly tiny either (5HP30 5 speed auto). Not sure if a Z3 tranny tunnel could support that gearbox. Although this article doesn't mention what transmission was used on this prototype 'fun-build', I would assume it is the 5HP30... if it is a manual, me and the 8 series guys would sure like to know what it is... as there weren't any manual transmission M73 powered 850's (only some of the early M70 powered cars and of course the S70 CSi).