page_title: Audi R10 TDI
section_title: Engine
hierarchical_section_title: Audi R10 TDI / Engine
caption_attribution_description: The engine bay of an Audi R10
context_page_description: The Audi R10 TDI, usually abbreviated to R10, is a diesel-powered racing car from the German car manufacturer Audi. The car dominated Le Mans, winning each year from its 2006 introduction until it was replaced by the R15 in 2009. It was designed and constructed for sports car racing in the Le Mans Prototype LMP1 class of the 24 Hours of Le Mans, and other similar endurance races. The car was unveiled 13 December 2005 at 12:00 CET, and went on to win both its maiden race at the 2006 12 Hours of Sebring in March, and the June 2006 24 Hours of Le Mans.
  It was the first diesel to win either of those events. At $15 million a year it was the most ambitious and most expensive project ever undertaken by Audi Sport.
  As of 2019, Audi R10 TDI LMP1 car was the last-ever V12-engined race car to date.
context_section_description: Unlike most racing cars competing in the LMP1 series, the R10 TDI is powered by a diesel engine, with two parallel turbochargers and utilizes the Turbocharged Direct Injection (TDI) technology. The engine block has a displacement of 5.5L in V12 configuration made of aluminium, employing common rail direct fuel injection technology. The turbochargers are supplied by Garrett AiResearch, with 39.9 mm (1.57 in) restrictor plates mounted in front of the intake.
  The V12 engine is rumored to weigh more than 200 kg (441 lb). This is heavier than the 130 kg (287 lb) of a concurrent Judd V10, and even the 180 kg (397 lb) of the Ricardo turbodiesel prototype based on it. Audi engineers say that the weight per cylinder is the same as the preceding 3.6-litre FSI V8 of the Audi R8. The wheelbase has been increased over the R8 to 2,980 mm (117.3 in) to accommodate the longer engine.
  Even with a larger-than-necessary restrictor plate, the car is rumoured to produce 700 hp (522 kW; 710 PS) in qualification, limited by the fuel combustion quality. This output cannot be maintained in races because it may cause a clogged diesel particulate filter. The peak pressure in the cylinder is probably around 200 bar, compared with 85 bar for an atmospheric petrol engine.
caption: The R10's 5.5 litre V12 TDI diesel engine.  Large  grey mechanical components on the lower left are the diesel particulate filters developed with Audi by Dow Automotive.
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