In terms of sprint times, the R8 is faster than the RS6 Avant up to 90mph as it needs 4.1 to go from zero to 60 (96km/h) and 8.0 sec to 90mph (145km/h) while the RS6 Avant stopped the clock at 4.3 and 8.3 sec respectively. From 90mph and above, the RS6 takes the lead sprinting from 0 to 120mph (193 km/h) in 13.8 sec and to 150mph (241 km/h) in 23.0 sec (R8: 14.6 and 25.0 sec respectively). The two cars manage to achieve the same time of 12.7 sec in the quarter mile sprint. -Continued
However, the R8 proves to be the ‘king’ of in-gear times crushing the RS6 Avant: 50-70mph in fourth takes 3.4 sec -0.3 sec less than the RS6, while 110-130mph in sixth gear, 7.2 sec or a whopping 2.6 sec faster than the Avant. Same goes for stopping power as the R8 came to a standstill from 100mph (160 km/h) in 4.1 sec and 289.9 ft compared to the RS6 Avant’s 4.3 sec and 299.4 ft.
EVO also tested the two range-topping Audis on the Bedford Autodrome race track. Once again, the R8 proved to be faster with a lap time of 1:26.5, or 1.4 sec less than the RS6 Avant.
So overall, it’s safe to say that the R8 is the quickest -and apparently the more rewarding from a driver’s point of view. But, before you make any judgments, just hold on a minute and think about this; we’re talking about a luxurious, full size station wagon that combines supercar-like performance and enough space to haul your entire family and a fortnight’s worth of luggage…
Via: EVO -Opening Picture Edited by Auto Cars 2011