Originally Posted by Alumac
Sorry, but I'm just not as impressed by what amounts to a tune of a turbo engine as I am a NA engine from M's past, and the purpose built engine of the e9x series. I am sure the F series engine will be great, but I feel like I've essentially already seen it in the form of N54/55. Great, just not that special for an M car.
As for the F1 engine, yes it's impressive, but that's not the kind of engineering going into the F series engines thus far.
Even though a purpose built M engine is more romantic than a tuned standard engine, M history shows that more often than not the M engine is based on a production engine: