By 1968, the thrill was beginning to fade, though the vehicle was used for racing development. Though the name lived on through, the true Charger had a life of 1966 - 1974. As one of the first mid-sized muscle cars, the 1966 Charger had more legroom than the competition, and boasted engines such as a standard 5.2-liter V8. There was also a 5.9-liter and a 6.3-liter engine that made 325-horsepower. There was also a 7.0-liter, 415-horsepower engine available. This was the HEMI, or hemispherical combustion chamber. The HEMI was discontinued in 1972.