The Pontiac Protosport4 is a concept car that offers comfort for four people while providing performance and handiing normally achieved only in sports cars. Pontiac have set their sights on building affordable sports cars, and the Protosport4 is the fourth generation of the latest series of hi-tech vehicles. The Protosport4 features four clamshell doors, four-wheel steering and a DOHC V8 to power a Hydra-matic four-speed automatic that feeds the rear wheels. Interestingly, this car features 19-inch front wheels and 20-inch wheels at the rear.