It's unclear what mad genius defined the classic muscle car, but it they are generally regarded as American-made, two-door, intermediate cars with powerful V-8 engines. The Pontiac GTO ...
Others say it was the 1964 Pontiac GTO due to its lightweight nature and its 389 CID V8 producing 348 horsepower. Whoever created the first muscle car is a debate that will likely never be settled.