On paper, the RS6 Avant and the RS7 look almost identical. However, you would never confuse them on the way. How different are the two cars in terms of performance?
Not much is the answer. Both are powered by the same 591 hp 590 lb-ft 4.0-liter V8Both use an 8-speed automatic transmission and both have a quattro AWD system. As it turns out, this makes them remarkably well coordinated.
Even their body styles don’t differ much from each other. In spite of the RS6 Avant With a car body style and the associated additional metal, the curb weight is only about 5 kg. It doesn’t seem to make much difference.
Both cars drive an impressive 11.6 seconds in the standing quarter mile. The RS6 Avant seems to have gotten off to a better start, but this one RS7 is slowly scratching its way back to a photo finish. In the sport mode rolling race, the two cars are neck to neck again.
The only really strange result is the rolling race in comfort mode. With the two nearly identical cars under nearly identical conditions receiving two nearly identical inputs, the transmission in the RS7 decides to react, while the RS6 Avant decides against it. A quick downshift gives the Sportback an easy win.
However, these results are discounted as a coincidence, which is pretty fair enough. It’s a fine distillation of the kind of secret that holds automatic transmission unfavorable in high performance applications. Occasionally being unable to tell what the system is thinking can be frustrating.
Really, when it comes to what to expect, the only difference between these cars is the person behind the wheel.