I'm not even that worried how much HP the M3 will produce to be honest. Like we've said a million times, if the 335i is that fast, the new M3 will be on a totally new level. When it comes to the drivetrain, it is guaranteed that it will at least match (I expect them to surpass, since they have had more time to improve) the RS4. You're worrying for no reason TA, you'll be amazed with the final product