2025 Audi S6

The Audi S6 is first and foremost a luxury car, a fact that's made clear by its smooth and quiet highway ride. But with summer tires and a sport-tuned adaptive suspension, it can also hold its own on a winding road. If the need for speed arises, a jab of the throttle is all it takes to remind you of the 444 horses at your disposal. In our testing, an S6 accelerated from 0 to 60 mph in 4.6 seconds, which isn't exceptional by modern standards but is quicker than its unassuming exterior might suggest.

The S6 currently doesn't have a direct competitor, but its closest rivals are the Mercedes-Benz E 450 and BMW 540i. Like the S6, both come standard with all-wheel drive and offer turbocharged six-cylinder power, though significantly less than the Audi. Other options you might consider include the Genesis G80, Cadillac CT5 and the S6's close relative, the hatchback-equipped Audi S7. Find out how the S6 stacks up against the competition in our test team's Expert Rating below.