Here you go, have your cake and eat it too. Porsche is looking to prove that the best of both worlds don't have to be mutually exclusive with the 918 Spyder concept scheduled to debut tomorrow at the 2010 Geneva Motor Show. Looking a bit like a Carrera GT evolved, the 918 Spyder is powered by both a 500-horsepower V8 and a pair of electric motors (one for each axle) producing an additional 218 hp or 160kW. At full gallop, the concept can theoretically reach 62 mph in 3.2 seconds and nip 198 mph...