you forgot the more common one m50.
Originally Posted by BMW lebanon
most tuned e30s here have m20 2.5/2.7 or m30 3.5 engine. you dont need a bigger engine. you can modify the chip, crank, headers, air filter, transmission..... and you will have a bomb
I know a lot about cars. I can look at a car's headlights and tell you exactly which way it's coming