The 2011 BMW ActiveHybrid 750 is available as a 4-door, 5-seat sedan. Starting at $102,300, the 2011 BMW ActiveHybrid 750 i is powered by a 4.4L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway. The top of the line 2011BMWActiveHybrid 750Li , priced at $ 106,200 , is powered by a 4.4L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway.