Resale value retained after five years: 47.3% This beast gets 22 miles per gallon on the highway. It gets a whopping 300 horsepower and tops out at 142 miles per hour in its base model. It comes with toys including the Porsche Communications Management system to link your various media and electronics, a rearview camera and Bose surround sound speakers. As much as the 24 cubic feet of rear space and 63 cubic feet of combined cargo space want to make the argument for this vehicle as a family hauler, it's a more of a midlife crisis with a motor. The Cayenne is Porsche's best-selling car in the U.S. by far. That's a lot of parents who just can't let their Porsche dreams go.