Originally Posted by MVF4Rrider
The F32 M3's engine still could be a V6TT. It's not ruled out yet as far as I know. BMW will have to do something to set it apart from the non-Ms.
There are a variety of reasons why this is next to impossible.
1. Heritage, experience (been discussed above)
2. BMWs belief in a mechanically balanced engine. I6 is naturally 1st and 2nd order balanced. V6 needs a significant supplementary mechanical balancing system in the engine itself. Certainly that does not mean a V6 can't be a great engine...
3. Two major corporate wide programs at BMW, "Material Cost Offensive" and
"BMW Group Modular Strategy". NOT having a special one-off engine for either the M3 or the M5 dove tails right in with these strategies.