Audi's midsized luxury SUV shares components with the Porsche Cayenne and Volkswagen Touareg, and offers a tight but serviceable third-row seat. The strong 350-hp, 4.2-liter V8 pulls smoothly, but returns just 15 mpg overall on premium fuel. A V6 is also available. Handling is fairly nimble, but doesn't shine at its limits. The ride is steady, though a little stiff at low speeds. Front-seat comfort is very good, interior fit and finish are excellent, and the cabin is quiet, but the MMI driver-interaction system is complex. A turbodiesel V6 was added in 2009, while both the V6 and V8 gas engines were replaced by a supercharged V6 in 2011.