modified car; custom car; remodeled car
Refers to a car that has been altered from its original factory state, often for performance, appearance, or personalization. Common in car enthusiast contexts.
He entered the race with a modified car.
This custom car has both its engine and interior customized.
Compound of 改造 (remodeling, modification) and 車 (car). The term is straightforward and modern, with no obscure historical derivation.