Porsche

While the new entry level Cayenne has a 300-horspower 3.6-liter V6 engine, thanks in part to the new eight-speed Tiptronic S automatic transmission it is approximately 20 percent more fuel efficient than the model it replaces. The high-torque Cayenne S with its 4.8-liter V8 likewise shows a significant decrease in fuel consumption, down by 23 percent. At the same time engine output is now 400 horsepower compared to 385 horsepower in the former Cayenne S. And similarly the range-topping Cayenne Turbo with its 500-horsepower, twin-turbocharged, 4.8-liter V8 is 23 percent more fuel efficient than its predecessor. The new Cayenne S Hybrid features a highly sophisticated parallel full hybrid system.