Review and Test: 2007 Audi S8

Car review and test featuring 2007 Audi S8 with a V10 that makes 450 horsepower at 7,000 rpm and 398 pound-feet of torque at 3,500. That 7,000-rpm mark is just a hair off redline and the engine feels strong and steady from just off idle to the top end of the tach.