Auto racing (also known as car racing, motor racing or automobile racing) is a sport involving the racing of automobiles for competition.

Almost as soon as automobiles had been invented, races of various sorts were organised, with the first recorded as early as 1867. Many of the earliest events were effectively reliability trials, aimed at proving these new machines were a practical mode of transport, but soon became an important way from competing makers to demonstrate their machines. By the 1930s specialist racing cars had developed.

There are now numerous different categories, each with different rules and regulations.

The best-known variety of single-seater racing, Formula One, which hosts the famous Monaco Grand Prix, involves an annual World Championship for drivers and constructors.

In single-seater (open-wheel), the wheels are not covered, and the cars often have aerofoil wings front and rear to produce downforce and enhance adhesion to the track. In Europe and Asia, open-wheeled racing is commonly referred to as "Formula", with appropriate hierarchical suffixes. In North America, the "Formula" terminology is not followed (with the exception of F1). The sport is usually arranged to follow an international format (such as F1), a regional format (such as the Formula 3 Euro Series), and/or a domestic, or country-specific, format (such as the German Formula 3 championship, or the British Formula Ford).

In North America, the cars used in the National Championship (currently the IndyCar Series, and previously CART) have traditionally been similar though less sophisticated than F1 cars, with more restrictions on technology aimed at controlling costs. The series' most famous race is the Indianapolis 500.

Source: Auto racing from Wikipedia

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