The 2016 BMW 550 is available as a 4-door, 5-seat sedan. Starting at $66,300, the 2016 BMW 550 RWD is powered by a 4.4L , 8 -cylinder engine that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway. The top of the line 2016BMW550AWD , priced at $ 68,600 , is powered by a 4.4L , 8 - cylinder engine that returns an EPA estimated 16-mpg in the city and 25-mpg on the highway.