Porsche 918 Spyder Concept

Porsche is telling us that we can have our cake and eat it too with the 918. It's a parallel hybrid with both a 500-horsepower V8 and a pair of electric motors adding another 218 hp. That's enough power to launch this Carrera GT-like supercar from 0-62 mph in 3.2 seconds as it charges on to a 198 mph top end. The best part about it is that Porsche says it can also return 78 miles per gallon while emitting just 70 grams of carbon dioxide per kilometer.