When was the first muscle car made?

There's no single definitive answer to when the first muscle car was made, as the term "muscle car" itself is somewhat subjective and its origins are debated. However, most automotive historians point to the late 1960s, with cars like the 1964 Pontiac GTO often cited as a key early example, if not the very first. The GTO's combination of a powerful V8 engine in a relatively smaller, affordable body is what really helped define the genre. However, other cars from around the same time period also contributed to the muscle car's development.