The 2009 Audi A5 is available as a 2-door, 4-seat coupe. Starting at $40,700, the 2009 Audi A5 (M6) is powered by a 3.2L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 27-mpg on the highway. The top of the line 2009 Audi A5 (A6), priced at $42,000, is powered by a 3.2L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 26-mpg on the highway.