Complex sentence: In the United States, the term "supercar" predates the classification of muscle car to describe the "dragstrip bred" affordable mid-size cars of the 1960s and early 1970s that were equipped with large, powerful V8 engines and rear wheel drive.
Split into simpler sentences: In the United States, the term "supercar" predates the classification of muscle car. It describes the "dragstrip bred" affordable mid-size cars of the 1960s and early 1970s that were equipped with large, powerful V8 engines and rear wheel drive.