2014 Audi RS7 vs. 2014 BMW M6 Gran Coupe, 2014 Mercedes-Benz CLS63 AMG S-model - Car and Driver

We’ve watched two Gulfstreams and a Learjet touch down in a span of 30 minutes, taxi along the stretch of pavement we’re using as our provisional test track, and tuck into spotless hangars. From what we can tell, this airfield is the EZ-In/EZ-Out parking garage for the planes of one-percenters who reside elsewhere. When you’re grounded, there’s no better way to travel than in Audi’s RS7, BMW’s M6 Gran Coupe, or Mercedes-Benz’s CLS63 AMG. The RS7, the M6, and the CLS63, however, are the top machines for those who insist on driving. Speed barons, kings of luxury, and fashion slaves, these cars exist in the overlap of an exotic automotive Venn diagram. Yet even 10-mile stretches aren’t enough to achieve top speeds, which in our cars are as high as 190 mph—a white van always seemed to veer into the left lane every few miles doing a mere 100 mph. And because a tank of gas only lasts 40 minutes when there aren’t speed limits, we trekked away from the freeway to a sinuous, tree-lined hill-climb to understand how differentials, adaptive dampers, and gummy tires shrink these large cars when... The A7 already knocked out the CLS550 and the 640i Gran Coupe in separate matchups. In our last Audi-BMW-Benz comparo [July 2012], the S6 shrugged. Source: www.caranddriver.com