Here are some numbers on the new S6:
0-60: 3.7 seconds
0-100: 9.2
0-130: 16.1
1/4 mile: 12.1 @ 115
http://www.caranddriver.com/reviews/...s6-test-review
The M5 is quicker but not by a huge margin like the last gen S6 vs. last gen M5
Zero to 60 mph: 3.7 sec
Zero to 100 mph: 8.3 sec
¼-mile: 12.0 sec @ 122 mph
http://www.caranddriver.com/reviews/...ad-test-review


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, i think it will definitely be lighter due to the new engine and this will improve the handling, of course it has to be at least in the range of the 600hp band to be able to keep up with the M5...it's going to be interesting 
