The original Mustang, built from the parts bin of the humble Ford Falcon but given its own body, its own name, and a launch at the 1964 World’s Fair that made it the fastest-selling new model in Ford’s history.[1]
Wikipedia’s article treats the whole 1964-1973 run as one generation, even though the car changed size substantially at facelifts in 1967, 1969 and 1971: the “1971” big-block Mustang shares almost nothing dimensionally with the original. This entry records only the dimensions and trims of the original 1964½/1965 launch car rather than blur nine years of growth into one average figure.