The roots of Audi stretch to 1899, when August Horch established A. Horch & Cie. in Cologne. After a dispute with his former partners in 1909, Horch was prohibited from using his own surname as a trade name and founded a new company in Zwickau; a friend's son, studying Latin in the corner of the room, suggested the Latin equivalent of "Horch" — thus "Audi" was registered on 25 April 1910.
In 1932, Audi merged with Horch, DKW, and Wanderer to form Auto Union AG in Chemnitz. The resulting group raced iconic Silver Arrow Grand Prix cars in the 1930s under the four-ring badge, though the individual marques retained their own identities for road cars. World War II devastated the group's Saxon factories. With its plants in Soviet-controlled East Germany, Auto Union executives relocated to Ingolstadt, Bavaria, in 1945, re-establishing as a West German company in 1949.
In 1958, Daimler-Benz acquired a controlling interest in the reconstituted Auto Union; by 1959 it held 100 percent. Finding two-stroke small cars incompatible with its interests, Daimler-Benz sold the business to Volkswagen in 1964. Volkswagen revived the Audi name in 1965 for a rebadged DKW F102 fitted with a new four-stroke engine. Auto Union then merged with NSU Motorenwerke in 1969 to form Audi NSU Auto Union AG, taking on NSU's Neckarsulm plant — today the production home of Audi's larger models and the Audi Sport GmbH subsidiary responsible for the R8 and RS range. The company's name was simplified to Audi AG in 1985 when the Auto Union and NSU brands were formally retired.
The Audi Quattro, introduced in 1980, transformed the company's image and motorsport standing. It was one of the first large-scale production vehicles to use permanent all-wheel drive through a centre differential, and it proved the viability of four-wheel drive in competition. In rallying, the Quattro won the World Rally Championship manufacturers' title in 1982 and 1984, and the drivers' title in 1983 (Hannu Mikkola) and 1984 (Stig Blomqvist). The short-wheelbase Sport Quattro S1 dominated Monte Carlo and Sweden in 1984, while Michèle Mouton — the only woman to win a WRC round — set a Pikes Peak International Hill Climb record of 11:25.39 in 1985 driving the S1. Walter Röhrl claimed further Pikes Peak records in 1987 with a time of 10:47.85 in the Audi S1. Audi formally withdrew from international rallying in 1986 following a fatal accident at the Portuguese rally.
Audi returned to top-level motorsport in 1999 with a factory sportscar programme run by Joest Racing. Debuting at Le Mans with the open-cockpit R8R and closed-cockpit R8C, the team found the open prototype concept more viable and developed it into the Audi R8, which went on to win Le Mans in 2000, 2001, and 2002 in consecutive years. Factory-backed R8s were also dominant in the American Le Mans Series, winning 25 races between 2000 and the end of 2002.
The R8 era was succeeded by the diesel-powered R10 TDI, unveiled in December 2005. The R10 made its race debut at the 2006 12 Hours of Sebring and went on to win Le Mans in 2006, 2007, and 2008. In 2008, the car broke the distance record set by the Porsche 917K at Le Mans in 1971. In 2010 the R15 TDI Plus continued the run of diesel victories. The R18 TDI won Le Mans in 2011 with Benoît Tréluyer, Marcel Fässler, and André Lotterer, holding off three Peugeot 908s by 13.8 seconds.
Audi participated in the FIA World Endurance Championship from its inaugural 2012 season, winning the first WEC race at Sebring and the 2012 Le Mans, securing the inaugural WEC Manufacturers' Championship. The team successfully defended that title in 2013, with a milestone 100th prototype victory at the Circuit of the Americas. Audi competed in WEC through 2016, winning further races before withdrawing at the end of that season.
In touring cars, Audi competed in the Deutsche Tourenwagen Meisterschaft (DTM) from 1990 and moved into Super Touring series across Europe from 1993, winning in France, Italy, Germany, and the British Touring Car Championship with the quattro-equipped A4. The FIA eventually banned four-wheel drive from Super Touring competition in 1998.
Audi entered the FIA Formula E Championship through factory support for Abt Sportsline from the inaugural 2014-15 season, competing as Audi Sport Abt Formula E Team. Lucas di Grassi won the Drivers' Championship for Audi, and the team secured a Teams' Championship. Audi accumulated 14 Formula E victories across seven seasons before withdrawing after the 2020-21 season.
Audi announced in August 2022 that it would enter Formula One as a power unit manufacturer from 2026, having been swayed by the sport's adoption of hybrid technology. In October 2022, Audi confirmed a partnership with Sauber Motorsport, initially acquiring a 75 percent stake and later announcing full 100 percent ownership of the team. Nico Hulkenberg was confirmed as Audi's first Formula One driver in April 2024, followed by rookie Gabriel Bortoleto. The Revolut Audi F1 Team made its Formula One debut at the 2026 Australian Grand Prix, with both Hulkenberg and Bortoleto retained for the inaugural season.
Audi's motorsport heritage is inseparable from its road car development: the Quattro's all-wheel drive technology became a defining feature of the brand's road car range, the S and RS performance models trace their lineage to rally-derived engines, and diesel hybrid technology developed for Le Mans informed the company's road car electrification strategy. The four-ring emblem and the Vorsprung durch Technik slogan — "Progress through Technology" — remain the most recognisable expressions of a brand built on engineering ambition that stretches back more than a century.
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