Noun
muscle car (plural muscle cars)
Any of a variety of automobiles, especially American sedans from the 1960s and early 1970s, that are modified to look and perform like race cars and equipped with large, powerful V8 engines that allow for quick acceleration to high speeds; but still designed for travel on regular highways.
At BIR, that includes the Bracket Drag Racing Series, which starts May 1-3; the NAPA Street Legals, which starts April 29; and the Muscle Car Series, which starts Memorial Day weekend with the Street Car Showdown. Source: Internet