The 2016 Audi A8 is available as a 4-door, 5-seat sedan. Starting at $81,500, the 2016 Audi A8 3.0T quattro Long Wheelbase Sedan is powered by a 3.0L, 6-cylinder engine that returns an EPA estimated 19-mpg in the city and 29-mpg on the highway. The top of the line 2016 Audi A8 4.0T Sport quattro Long Wheelbase Sedan, priced at $90,500, is powered by a 4.0L, 8-cylinder engine that returns an EPA estimated 18-mpg in the city and 29-mpg on the highway.