The 2017 Tesla Model X is available as a 4-door, 5-seat sport utility. Starting at $79,500, the 2017 Tesla Model X 75D is powered by a , 0 -cylinder engine mated to an automatic transmission that returns an EPA estimated 91-mpg in the city and 95-mpg on the highway. The top of the line 2017TeslaModel XP100D , priced at $ 140,000 , is powered by a , 0 - cylinder engine mated to an automatic transmission that returns an EPA estimated 81-mpg in the city and 92-mpg on the highway.