The Porsche Cayenne S E-Hybrid is the best luxury SUV hybrid sold today. The stock engine in the auto is a supercharged 3.0 liter V-6 rated at 333 horsepower and 435 lb-ft of torque. The electric motor adds 95 horsepower for a total 416 horsepower power output. The Cayenne S E-Hybrid is extremely fast with a top overall speed of 151 MPH, and a zero to 60 MPH time of 5.4 seconds. The overall gas mileage rating of the vehicle is 47 MPGe (combined), and the combustion engine on the auto is only used when the accelerator is depressed beyond a pre-programmed set-point. If only using the battery to power the vehicle, the top all-electric speed of the SUV is 78 MPH.