The Model X is Tesla's original SUV model, a mid-sizer notable for being the auto industry's first long-range all-electric utility. Under its ungainly exterior is a roomy exterior that will seat up to seven, plus loads of cargo space front and rear. The electric, all-wheel drive powertrain is potent and provides silently swift acceleration. Among the futuristic Model X's neater touches is its electric top-hinged "falcon wing" rear doors.