Muscle Car

A muscle car is a high-performance automobile. The term principally refers to American, Australian and South African models and generally describes a rear wheel drive mid-size car with a large, powerful V8 engine and special trim, intended for maximum torque on the street or in drag racing competition. It is distinguished from sports cars, which were customarily and coincidentally considered smaller, two-seat cars, or GTs, two-seat or 2+2 cars intended for high-speed touring and possibly road racing. High-performance full-size or compact cars are arguably excluded from this category, as are the breed of compact sports coupes inspired by the Ford Mustang. Other factors used in defining classic muscle cars are their age and country of origin. A classic muscle car is usually but not necessarily made in the US or Australia between 1964 and 1975.
An alternate definition is based on power-to-weight ratio, defining a muscle car as an automobile with (for example) fewer than 12 pounds per rated hp. Such definitions are inexact, thanks to a wide variation in curb weight depending on options and to the questionable nature of the Society of Automotive Engineers (SAE) gross hp ratings in use before 1972, which were often deliberately overstated or underrated for various reasons.