The second-generation Ford Mustang, marketed as the Ford Mustang II, is a two- or three-door, four-passenger, front-engine/rear-drive pony car manufactured and marketed by Ford from 1973 until 1978. Introduced in September 1973 for model year 1974, the Mustang II arrived roughly coincident with the oil embargo of 1973 and subsequent fuel shortages. Developed under Lee Iacocca, it was an "entirely new kind of pony car." Ford "decided to call it Mustang II, since it was a new type of pony car designed for an era of high gas prices and fuel shortages."

Pony car is an American car classification for affordable, compact, highly styled coupés or convertibles with a "sporty" or performance-oriented image. Common characteristics include rear-wheel drive, a long hood, a short decklid, a wide range of options to individualize each car and use of mass-produced parts shared with other models. The popularity of pony cars is largely due to the launch of the Ford Mustang in 1964.