Supercars Championship in the context of Canberra 400

Sports car racing is a form of motorsport road racing that uses sports cars with two seats and enclosed wheels. The cars in question may be either purpose-built sports prototypes, which are the highest level in sports car racing; or grand tourers (GT cars) which, being based on road-going models, are considerably more common, but not as fast. Sports car races are often endurance races run over particularly long distances or large amounts of time (generally between 6 and 24 hours), resulting in an emphasis on reliability and efficiency of the car and its drivers over outright car performance or driver skills. The FIA World Endurance Championship and IMSA SportsCar Championship are some of the best-known sports car racing series, and so is the GT World Challenge. Sports car racing is one of the main types of circuit auto racing, alongside open-wheel racing (such as Formula One and Indycar), touring car racing (such as BTCC and V8 Supercars, which is based on 'saloon cars' as opposed to the 'exotics' seen in sports cars) and stock car racing (such as NASCAR).

A hybrid of the purism of open-wheelers and the familiarity of touring car racing, sports car racing is commonly associated with the annual 24 Hours of Le Mans endurance race. First run in 1923, Le Mans is one of the longest-running motor races. Well-known defunct sports car races include the Italian classics, the Targa Florio (1906–1977) and Mille Miglia (1927–1957), and the Mexican Carrera Panamericana (1950–1954). Most top-class sports car races focus more on endurance and strategy than pure speed or skills, and longer races usually involve complex pit strategies and regular driver changes. As a result, sports car racing is seen more as a team endeavour than an individual sport, with team managers such as John Wyer, Tom Walkinshaw, driver-turned-constructor Henri Pescarolo, Peter Sauber and Reinhold Joest becoming almost as famous as some of their drivers.

Touring car racing is a form of motorsport racing featuring production-based cars that are modified for competition. The discipline emphasizes close racing, balanced performance, and manufacturer diversity, with cars that still resemble their road-going counterparts. Originating in Europe in the mid-20th century, touring car racing has since expanded globally through rule sets such as Group A, Super Touring, and the FIA TCR formula. Major championships include the British Touring Car Championship (BTCC), German Touring Car Masters (DTM), and Supercars Championship. It has both similarities to and significant differences from stock car racing, which is popular in the United States.

Modern touring car championships increasingly rely on Balance of Performance (BoP) and cost-control regulations to ensure close competition among manufacturers and private teams. The adoption of hybrid technology and the introduction of electric touring car series, such as the ETCR (now FIA E-Touring Car World Cup), mark the category’s adaptation to sustainability trends in motorsport. While the cars do not move as fast as those in formula or sports car races, their similarity both to one another and to fans' own vehicles makes for well-supported racing. The lesser use of aerodynamics means following cars have a much easier time passing than in open-wheel racing, and the more substantial bodies of the cars makes the subtle bumping and nudging for overtaking much more acceptable as part of racing.