The 2016 Audi A5 is available as a 2-door, 4-seat coupe. Starting at $40,500, the 2016 Audi A5 (M6) quattro Coupe is powered by a 2.0L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 32-mpg on the highway. The top of the line 2016AudiA5quattro Cabriolet , priced at $ 47,900 , is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway.