F10 M5 Discussion
There are two things to consider here regardless of the final Horsepower or exact weight:
1) Power to weight ratio and 2) comparisons to what we DO KNOW about the X5 M and X6 M, since I think we all agree the new M5 will have a similar v8 twin turbo with more horsepower.
I have a 2011 X5 M but...