A muscle car is a big, heavy car, usually boxy, with a powerful 6 cylinder and/or an eight cylinder engine. Muscle cars are not sports cars. Muscle cars are meant for straight line performance. They are mainly used for drag races because they have bad handling. They are also rear wheel drive cars.American muscle cars:Chevy Camaro/Pontiac Firebird/Pontiac TransAmPontiac GTO/Chevy ChevelleFord Mustang/Mercury CougarDodge Challenger and Dodge Chargerand much more.German Muscle Cars:Audi S4/Audi Rs4/Audi S6Bmw M5/the new BMW M3/BMW M6All Mercedes AMG series.Porsche 944/Porsche 928/Porsche Panamera