The RS5 is just too heavy to defeat the M3. But it does look like it is making all of its 450 horsepower.
0-60: RS5 4 seconds, M3 3.9, CTS-V 3.9
1/4 mile: 12.5 @ 112, 12.4 @ 114, 12.2 @ 118
0-150: 25.9, 24.6, 22.5
skidpad: .98, .96, .90
weight: 4,000, 3600, 4260
quick summary
http://killwithfire.blogspot.com/201...bmw-m3-vs.html