page_title: Audi R18
section_title: 2012: R18 ultra and R18 e-tron quattro
hierarchical_section_title: Audi R18 / 2012: R18 ultra and R18 e-tron quattro
caption_attribution_description: English: FIA World Endurance Championship 2012 Rd.7 6 Hours of Fuji: #1 Audi R18 e-tron quattro (Audi Sport Team Joest), driven by André Lotterer)
context_page_description: The Audi R18 is a Le Mans Prototype racing car constructed by the German car manufacturer Audi AG. It is the successor to the Audi R15 TDI. Like its predecessor, the R18 uses a TDI turbocharged diesel engine but with a reduced capacity of 3.7 litres and in a V6 configuration. For the first time since the 1999 R8C, Audi's Le Mans prototype uses a closed cockpit design. The R18 is also the first racing car from Audi to feature hybrid power.
  Although Audi have previously given each new developed model of endurance racing car a distinct model number, the head of Audi Sport, Wolfgang Ullrich, suggested the R18 designation for Audi endurance racing cars could be used for the foreseeable future as a result of rival car manufacturer Renault already holding trademarks for car model names R19 through to R35. There were five further evolutions of R18 until Audi quit the FIA World Endurance Championship in 2016.
context_section_description: For 2012, Audi introduced an evolution of the original car called the R18 ultra and R18 e-tron quattro which won Le Mans. Both the Ultra and e-tron quattro R18 were run at the 2012 24 Hours of Le Mans. In addition to the changes required by the regulations (reduced air intake restrictor and 60 litre fuel tank) the car was completely reworked to reduce weight. These changes included Xtrac sequential electrically activated 6-speed racing gearbox with gearbox housing made of new carbon-fiber composite with titanium inserts, carbon clutch, changes to the carbon-fiber composite aluminum honeycomb monocoque built by Dallara, Single Garrett (Honeywell Turbo Technologies) turbocharger with boost pressure limited to 280 kPa absolute, 
  Bosch MS24 engine management, 1 x 45.8 mm diameter air restrictor, OZ magnesium forged wheels, Michelin Radial 360/710R18 front and 370/710R18 rear tires.
caption: Top view of the Audi R18 e-tron quattro at the 2012 6 Hours of Fuji, driven by André Lotterer.
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