Porsche is adding another model to its Cayenne SUV lineup — adding a "coupe" with a sloping fastback-style roofline. While it has four doors, meaning it's not actually a coupe, the Cayenne's sloping roofline fits in perfectly with traditional Porsche styling. Porsche's adaptive aerodynamics come standard with the Coupe, adding a retractable spoiler that increases traction at the rear wheels while reducing front axle lift. In addition to its normally-aspirated six cylinder, the Cayenne Coupe also comes in Turbo guise, adding a twin-turbo V8 and a healthy dose of performance. Even better than the exterior is the interior, with a new scheme that adds a houndstooth pattern insert to the seats. The Cayenne Coupe will come standard with 20-inch wheels and Porsche's active suspension, making this new Cayenne one of the sportiest SUVs you can buy.