Sports car racing is a form of circuit auto racing with sports cars that have two seats and enclosed wheels. They may be purpose-built (Prototype) or related to road-going models (Grand Touring). A type of hybrid between the purism of open-wheelers and the familiarity of touring car racing, this style is often associated with the annual Le Mans 24 Hours endurance race. First run in 1923, Le Mans is one of the oldest motor races still in existence. Other classic but now 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 emphasize endurance (typically between 2.5-24 hours), reliability, and strategy, over pure speed. Longer races usually involve com