Technically if it has any modifications sans perfromance it is correct to call it a hot rod.

common defs;

"Automobile rebuilt or modified for high speed, fast acceleration, or sporty appearance. A wide range of automobiles may be called hot rods, including some of those used in drag racing as well as those used in recreational cruising. They may be composed of used or new parts. Some are intended primarily for exhibition."

"An automobile that has been rebuilt or modified to increase its speed and acceleration."

Kitz