The TCR International Series was an international touring car championship. The championship was promoted by World Sporting Consulting (WSC), founded by former World Touring Car Championship manager Marcello Lotti. It was marketed as a cost-effective spin-off of the WTCC, targeted at C-segment hatchbacks production-based touring cars. The title TCR follows the naming convention now used by the FIA to classify the cars that compete in touring car racing, with TC1 referring to the top tier as used by the FIA WTCC and TC2 referring to the legacy cars which principally compete in the FIA ETCC.

Touring car racing is a motorsport road racing competition that uses race prepared touring cars. It has both similarities to and significant differences from stock car racing, which is popular in the United States.