Audi S8 – Photo Gallery: In an attempt to disprove that large and nimble are mutually exclusive, Audi has created the 2007 S8, a sport-tuned version of the luxury brand's grand sedan, the A8 (albeit not the long-wheelbase version). Thanks to the generous use of aluminum in its construction, the S8 (and A8) is relatively light, which allows its 450-horsepower V10 engine to be all that much more effective. In fact, that sophisticated piece of hardware, when coupled with S8's standard quattro all-wheel drive and six-speed automatic transmission, allows this most athletic rendition of Audi's flagship to reach 60 mph in only 4.9 seconds.