The 2009 Audi A8 is Audi's large luxury sedan, offering powerful V-8 and 12-cylinder engines; all-wheel drive; and one of the most luxurious, well-designed, and technology-laden interiors of any vehicle. The A8 is offered in two lengths, the standard A8 and extended-length A8 L, which offers expanded backseat legroom, with the top-of-the-line A8 L W12 residing as Audi's flagship sedan for luxury and technology.