Thanks to minor changes made primarily to the exhaust manifold, the S8 boasts an extra 15 ponies versus the smaller S6, which also features the V10 engine. That equates to 450 horsepower at 7,000 rpm, while torque remains unchanged with 398 lb.-ft. peaking at 3,500 rpm (90 percent of the maximum torque is available from 2,300 to 6,200 rpm). Audi reports a 0-60 mph time of 4.9 seconds, or 0.2 seconds faster than the S6.