The 2014 Audi A8 is available as a 4-door, 5-seat sedan. Starting at $82,500, the 2014 Audi A8 3.0 TDI quattro Long Wheelbase Sedan is powered by a 3.0L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 36-mpg on the highway. The top of the line 2014 Audi A8 4.0T quattro Sedan, priced at $83,900, is powered by a 4.0L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 28-mpg on the highway.