The 2015 Infiniti Q60 is available as a 2-door, 4-seat coupe. Starting at $40,950, the 2015 Infiniti Q60 Journey (A7) RWD Coupe is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 27-mpg on the highway. The top of the line 2015InfinitiQ60Sport (M6) RWD Convertible , priced at $ 53,400 , is powered by a 3.7L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 24-mpg on the highway.