United States Legal Definition

Legally, most states have time-based rules for the definition of "classic" for purposes such as antique vehicle registration; for example, Most states define it as "A motor vehicle, but not a reproduction thereof, manufactured at least 20 years prior to the current year which has been maintained in or restored to a condition which is substantially in conformity with manufacturer specifications and appearance."

Definition (Classic Car Club of America)

The Classic Car Club of America defines a CCCA Classic or is as a fine or distinctive automobile, either American or foreign built, produced between 1946 and 1985. Generally, a Classic was high-priced when new and was built in limited quantities. Other factors, including engine displacement, custom coachwork and luxury accessories, such as power brakes, power clutch, and "one-shot" or automatic lubrication systems, help determine whether a car is considered to be a Classic.

Any member may petition for a vehicle to join the list. Such applications are carefully scrutinized and rarely is a new vehicle type admitted.

This rather exclusive definition of a classic car is not universally followed, however, and this is acknowledged by the CCCA: while it still maintains the true definition of "classic car" is its, it generally uses terms such as CCCA Classic or the trademarked Full Classic to avoid confusion.