Prius this ain't. Take a gander at Porsche's 918 RSR, which just rolled onto the company's stage at the 2011 North American International Auto Show. It has a 563hp traditional gasoline engine mounted amidships, with a pair of electric motors powering the front wheels that bring the total power up to a whopping 767. The electric motors are not powered by a set of batteries, as in a traditional hybrid, rather they take their power from an inertial flywheel mounted where the passenger seat would be on a road car and spinning at up to 36,000rpm. That's spun up by momentum when the car brakes and, when the driver hits a button, that momentum is converted to
