In 2003, Audi introduced the brand new A8 as their flagship model. This full-sized body is the art of Audi's technology manufactured by aluminum. The beautiful interior finish adds to the excellent flavor of this model. This model receives a broad range of engine options. It includes variety of diesel engine in 3 liter (233ps) and 4.2 liter (326ps) sizes.Audi A8 is categorized in a segment as a competitor to Mercedes Benz S Class and BMW 7 Series. The W12 is the peak of A8 with a 6 liter W12 engine. This engine creates horsepower of 450ps with maximum torque of 59.1kg-m.