Small cars with large engines built primarily to go very fast are referred to as

Muscle cars refer to American high-performance vehicles from the 1960s-70s that combined small, lightweight bodies with large, powerful V8 engines. They were built primarily for straight-line speed and acceleration. "Racers" and "Lightning Mobiles" are not standard automotive terms, and "Road Hogs" is typically a derogatory term for inconsiderate drivers.