A1 Grand Prix

A1 Grand Prix) is an open-wheel auto racing series. It is unique in its field in that competitors represent their nation as opposed to a constructor, which is traditional in most formula racing series including Formula One. As such, it is often promoted as the World Cup of Motorsport. The series is ratified and regulated by the Fédération Internationale de l' Automobile (FIA), and races (collectively known as A1GP World Cup of Motorsport) are held in the traditional Formula One off season, the northern hemisphere winter.

The A1GP formula provides for one car to be delivered to each team. Each such car is mechanically identical, built with many technical restrictions designed to limit performance, reduce running costs, and prevent any one or number of teams gaining an advantage through better equipment. This regulation provides a level playing field in which it is hoped driver skill and team effort becomes the primary factor for success.

Specifically, the cars have a 600 kg monocoque chassis designed by Lola and model-370/660R13 slick tires from Cooper. Zytek provide a performance-limited 3.4 litre V8 engine, however its performance limitation can be overcome by the driver pressing a button on their steering wheel. This so-called boost button or overtake button increases the engine output, revs and horsepower while the accelerator remains depressed, increasing speed and facilitating easier overtaking. The overtake button may only be used a limited number of times in each race, which is pre-programmed beforehand and identical for each car.

A1 Grands Prix of Nations take place over a three-day period, from Friday to Sunday. The teams are given five sets of dry weather slick tires, and two sets of wet weather treaded tires per weekend. However, if the weather is extreme, the team can be given more wet weather tires at the expense of the slick tires. The race weekend starts with two one-hour practice sessions held on the Friday, and then another on the Saturday morning. A two-hour qualifying session takes place on Saturday afternoon, and two races take place on Sunday. Primarily, the three practice sessions are for car setup and track familiarisation before the official competition begins with Saturday qualifying. Three different drivers may participate in the three practice sessions; the driver elected for qualifying or for one of the races must have taken part in at least one such practice session.