Midsize SUV will take corners with sports-car finesse and bring home a load of firewood The Cayenne SUV is now Porsche’s top seller in the U.S. and fortifying its position this year is the four-door, fastback Coupe model. Sharing a foundation and mechanicals with the squared-off Cayenne, the hunky stance of the Coupe is a fusion of style and skill. And so what if this variant costs about $8,500 more than its donor for a...