But still, it is quite tempting to think about a mid-front mounted V6 in the M4.
It is also hard to understand how Mercedes AMG can build specific engines for different models; TC 2.0l I4 for the A AMG, TC 4.0l V8 for the C AMG, TC 6.0l V12 for S AMG, TC 5.5l V8 for E AMG, NA 5.5l V8 for SLK AMG.
M5/M6 engine is "ok". M3/M4 engine might be ok. But if M2 engine will be a tuned N55, that will be an EPIC fail for the second time (1M first EPIC fail). The M2 better get a special I4 or a detuned M3/M4 engine.