Audi TDI: R10 V12 TDI®

That Audi is the world’s first automobile manufacturer to compete for overall victory at the legendary 24 Hours of Le Mans with a diesel engine and is, as a result, a step ahead of the competition.

With the V12 TDI® for Le Mans, Audi demonstrates impressively just how much potential TDI® technology has. The Audi customers will once again benefit from the experience gained in motorsport as they did from the R8 and the quattro® models.

Audi TDI® - Perennial Winner in Motorsports

At the beginning, the drivers couldn't believe their ears - long time professionals like Frank Biela (Germany) and Tom Kristensen (Denmark) had to completely change their driving habits. Up to then, they had acclimatized themselves to the engine noise in their open sports cars - and now, from a certain speed onward, it could no longer be heard. That's how quietly the V12 TDI® runs in the new Audi R10.

With the 12 cylinder diesel, Audi had written a completely new chapter in the history of motorsports. The 5.5 liter TDI®, which was created according to the rules applied at the Le Mans 24 hour race, is a superior racing engine. Its torqueTorqueTorque is what causes rotational speed to change. Just as greater net forces cause greater linear accelerations, greater torques cause greater rotational or angular accelerations.Torque - at more than 800 lb/ft. - is vastly superior to any gasoline engine. At the engine's rated speed it puts out more than 650 hp - enough for a top speed of over 200 mph, depending on transmission.

The low fuel consumption of the V12 TDI® is another strength. Compared to its predecessors - the already highly efficient R8 with gasoline direct injection, the R10 in Le Mans consumed about 10 percent less fuel, although the long, straight stretches along the Sarthe and 75 percent full load operation only partially showcased the advantages of the diesel engine.

Fewer Fill Ups Equal Victory

The long fuel range, which means fewer stops for refueling, was the key to victory at the classic 24 hour race. Biela and teammates Emanuele Pirro (Italy) and Marco Werner (Germany) only had to refuel their No. 8 car 27 times during the race. They completed 380 laps - or 2,003 miles - at an average speed of 133.9 mph.

Fresh from their victory at Le Mans, Audi then went on to the American Le Mans series and achieved something no carmaker had previously done - the R10 won all eight races it entered during the course of the season. The string of victories stretched throughout the United States. It began in March with the 12 hour race in Sebring, Florida, and ended in October in Laguna Seca, California. Allan McNish (Scotland) and Dindo Capello (Italy) were declared overall winners in the big LMP1 category long before the season ended.

The 2006 Race Engine of the Year

A jury from the British trade magazine, "Race Engine Technology", selected the V12 TDI® from the Audi R10 as the "2006 Race Engine of the Year" and the "Alternative Race Engine of the Year". For its design engineer, Ulrich Baretzky, Audi Sport's Head of Engine Technology, and Dr. Wolfgang Ullrich, Head of Audi Motorsport, it stands as the perfect example of close cooperation between motorsports and regular production.

"We were able to rely on the know how and the engine test rigs of our colleagues from series production development," Ullrich said. At the same time, the exchange of information also functioned in the opposite direction. Technical highlights such as the aluminum crankcase that can cope with extremely high ignition pressures lend important new impetus to production development."

Audi had carried out comparable technology transfer processes as far back as the late 1980s. At that time the touring cars from Ingolstadt - with their gasoline turbo engines that at times reached more than 700 hp - dominated the TransAm and the IMSA races. As was true 20 years ago, today's motorsports continue to provide crucial advances to the development of high volume production cars.

New Victories in Le Mans and in the ALMS Series

Biela, Pirro and Werner also managed to prevail at the 2007 Le Mans 24 hour race with the Audi R10, despite the fact that race organizers restricted the fuel tank size. Under difficult weather conditions, the trio completed the 369 laps at an average 130.0 mph. The third win was completed in the 2008 race - against a very strong competition. The diesel racing car with the four rings also stormed from one victory to the next in the American Le Mans Series. The car secured its 20th victory in a row in the LMP1 class at the street circuit in Detroit, handing Audi its eighth straight title as a manufacturer. The Audi R10 TDI was also victorious in the Le Mans Series, based in Europe.

Truth in TDI®

It’s tested. It’s here. It’s now.