As far as the term “sport-utility vehicle” and its application here, only the fifth-best seller is a genuine body-on-frame, truck-based vehicle. The others use cars as foundations. Only one of these SUVs can be powered by a V8 and is, in fact, always V8-engined. Two offer hybrid powertrains and one is a 4-cylinder only. Front-wheel drive, you might like to know, is available on the four best-selling SUVs in America.