Makes no sense!

[Dum-Dum]

You forgot the 320iS.

A narrow body small capacity S14 M3 engine, Italian and Portugese market only IIRC, tax laws at the time would have made a 2.3 or the later 2.5 prohibitively expensive so an S14B20 was made for them instead of an S14B23/25, 192 bhp 210 Nm.

I didn't forget I deliberately omitted. Technologically they were some of the best engines as they made good power from the small capacity (and thus lower weight) but old BMW's never feel "right" with a 4 cylinder engine.