[BMW269]

So both M4 and M2 will have 6 cylinder engines? I don't think. The N55 is a heavy engine. An M2 with 360 PS from a 2.2l I4, with a more rev friendly engine, much lighter and with better balance would make the M2 remarkably better than the M235i. It would be like an M3 CSL in terms of power, weight, size and of course handling, but even better thanks to higher torque.

The 1M is not much more powerful than the 135i however it is by far a better handling car. The same goes for the M2 vs. M235i. The 1 Series with N54/N55 feels nose heavy compared to the 3 Series with this engine. In fact a 128i E82 has a better handling than the 135i E82, just not the straight line performance, but also better response and sound. The N55 is not rev-friendly as it has longer stoke, what is not the case of the S63 stroke, which is undersquared, so more rev-friendly, what an M should be about.