The 2016 Infiniti Q70 is available as a 4-door, 5-seat sedan. Starting at $49,850, the 2016 Infiniti Q70 3.7 RWD is powered by a 3.7L , 6 -cylinder engine that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway. The top of the line 2016InfinitiQ705.6X AWD , priced at $ 65,350 , is powered by a 5.6L , 8 - cylinder engine that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway.