Originally Posted by Red Bread
Sort of true, but the S14 is still an M10 block with M88 heads with two cylinders removed. Semantics really, but the block and 150% of the head was used in all sorts of BMW's.
Not to hijack but please tell me what other cars??
I said it was basically the same engine that was in the M5/6 or the period, but what else?
There might have been derivations of the engine used in other cars but the intake was unique to M cars with individual throttle bodies. The valve train was unique and used shim and bucket. They didn't share cam's with anything else.
Even the thermostat setup was different.
The S14 didn't show up in any other car.
The latter six cylinder M3 cars shared engines components with all other 6 cyl cars from the period.