A production car that has been modified by the owner in the attempt to increase acceleration and top end speed . Although the term can be applied to any modified car, it is usually reserved for vehicles produced from 1930 to 1940's. Typically the engine is modified, and some body panels removed. Many were painted with a design of flames behind the front wheels to give the appearance that this vehicle was "hot" -- thus the name.
HOT ROD
Meaning of HOT ROD in English
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012