Ever since the BMW M6 Gran Coupe was launched, the Audi RS7 was the car to compare it with, even though it took a while to see the Inglostadt-based manufacturer launch the high-performance S7. Now, that it’s finally here, it was about time we read a complete comparison of the 3 German monsters.
Car and Driver set out to compare the Gran Coupe with the RS7, the Mercedes-Benz CLS63 AMG S-Model and a Porsche Panamera but the latter decided it wouldn’t be fair to compare their car to the other Germans so they didn’t throw in their 4-door model (afraid, possibly?).
Out of the 3, the M6 Gran Coupe started with a slight deficit: it’s the least powerful of the bunch and has rear-wheel-drive. That doesn’t mean that it won’t go after the Benz or the Audi though… No, this is a BMW and it will fight anything you throw at it.
The 560 HP and 680 Nm (501 lb-ft) of torque of the Bimmer were a bit short of Audi’s 700 Nm (516 lb-ft) and 568 HP and even more behind Mercedes’ 585 HP and 800 Nm (590 lb-ft) of torque. However, even with their all-wheel-drive systems, they couldn’t pull away from the BMW in the sprint tests conducted.
The 0-60 mph test showed that the Audi is faster by just 0.1 seconds compared to the BMW and 0.2 seconds slower than the CLS63 that reached the benchmark speed in 3.2 seconds. That was from a standstill. Looking over the rolling start results, guess what? The BMW is fastest, doing the 5-60 mph sprint in 4 seconds (0.4 seconds faster than the Audi and 0.1 faster than the Merc).
Furthermore, in the 610-ft-slalom test, the BMW achieved the highest overall speed with 44.1 mph (70.5 km/h), proving that rear-wheel-drive is still the best way to go. However, other areas showed that the BMW could also use some improvement.
No matter, though, all three cars are incredible engineering masterpieces and the differences between them are so small that you’d really have to look for the slightest mistakes to set them apart. In the end, the BMW came in second, the Audi first and the Mercedes