The still-futuristic looking Tesla Model X is not only a quick and nimble family-size crossover, it remains the longest-range SUV on the market. The Model X was offered with a number of battery packs for 2016 that delivered an operating capacity that varied from between 200 and 289 miles on a charge, with EPA ratings from 81/92 MPGe to 91/95 MPGe city/highway.