page_title: Formula racing
section_title: Defunct series
hierarchical_section_title: Formula racing / Defunct series
caption_attribution_description: English: Formula Asia V6 by Renault launch event in Hong Kong.
context_page_description: Formula racing is any of several forms of open-wheeled single-seater motorsport road racing. The origin of the term lies in the nomenclature that was adopted by the FIA for all of its post-World War II single-seater regulations, or formulae. The best known of these formulae are Formula One, Formula Two, Formula Three and Formula Four. Common usage of "formula racing" encompasses other single-seater series, including the GP2 Series, which replaced Formula 3000.
  Categories such as Formula Three and FIA Formula 2 Championship are described as feeder formulae, which refers to their position below Formula One on the career ladder of single-seater motor racing. There are two primary forms of racing formula: the open formula that allows a choice of chassis or engines and the control or "spec" formula that relies on a single supplier for chassis and engines. Formula Three is an example of an open formula, while Formula BMW is a control formula. There are also some exceptions on these two forms like Formula Ford where there is an open chassis formula but a restricted single brand engine formula.
context_section_description: Formula series from the 21st century that could be categorised between Tier 1 and Tier 5 (see top of page), but are now defunct, are described below.
caption: Formula Asia V6 launch event in Hong Kong in 2006
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