Good and fair question.

The 4.0 NA engine in the RS is great and sounds great, but the chassis feels like it could easily handle a lot more power and it does not feel THAT fast in a straight line. Not that this matters too much on track, but still the power and torque of the 997 GT2 RS were certainly impressive... 

 

I wonder what engine they will use, a derivative of the current MH 176/MH177 engine generation? In other words, a turbo charged version of the (road) GT3/RS and (race) GT3 R engine, which could also be the base engine of the 2017 RSR?