A World Rally Car is a racing automobile built to the specific regulations set by the Fédération Internationale de l'Automobile (FIA) and designed for competition in the World Rally Championship (WRC). The cars were introduced in 1997 as a replacement for Group A regulations used in the manufacturers' championship, and were replaced by Group Rally1 in 2022.

Group Rally1 is a technical specification of rally car for use at the highest level of international rallying in the World Rally Championship (WRC) as determined by the FIA. Despite the use of the word 'Group' in the name, there are not multiple classes or subclasses of car and so 'Rally1' may be used alone with the same definition. Rally1 cars were used for the first time in the 2022 WRC season and replaced the outgoing World Rally Car used in the manufacturer's championship. Though they may run on any individual rally as permitted by the organiser, they are not be used in any other championship.