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Performance Proven In Tough Endurance Races

TDI-powered V-12 R10 has won 13 times in 21 races. Now diesel's next battle is for luxury-car buyers

Racing is generally a colossal waste of money for auto makers, as Jaguar proved with its multimillion-dollar failed foray into Formula One in the late 1990s and earlier this decade. Audi, Volkswagen AG's luxury brand, may be the rare exception.

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