Looking at the specs, you would think that the RS7 doesn't stand a chance. Even with the performance pack, this 605 HP sports vehicle can only reach 100 km/h in 3.7 seconds, compared to the Mercedes-AMG's 3.4 seconds.
Both cars have AWD and automatic gearboxes, but the AMG does better launches and packs about 15% more torque. However, all bets are off once the race starts as it's the RS7 that digs itself out of the hole faster.
It's neck-and-neck down the runway, but by the time they reach the quarter-mile market, the GT-R is ahead, followed by the E63 and the RS7 just behind it.
This is one of those rare drag races where the outcome is slightly irrelevant. You see, the GT-R is only about a Dacia Sandero's worth cheaper than the E63 S. And let's be serious here, which would you rather have?
The RS7 has never been all that popular, but it's now reaching the end of its life so there's little point to getting one... unless you love that machine gun exhaust sound, which we can totally understand. With a tune, any one of these cars could become faster in a quarter-mile race, but only the AMG has a rear-wheel drive mode that lets you drift. Also, it's got by far the best badge too.