I have this same problem with my 1990 740 and I've also had it on 240's.

I cleaned the throttle body, replaced coolant temp sensor, tested the cold-start injector, swapped the MAFS, knock sensor, and FPR.

Nothing fixed it.

My fix: on cold mornings when I first start the car I push the pedal down a bit to rev it up a few thousand RPM. The car runs rich, burns out the extra fuel and within a few seconds is running normal. It is much less likely to stall after that but still requires attention at the gas pedal.

I hate that fix because revving up a cold engine is not good and the extra fuel at start up is prematurely fouling plugs and oxygen sensor (probably only slightly so). However, stalling on a left turn and getting t-boned is worse than revving a cold engine.