Quote:
Audi Sport accepted yet another award to start the new year: the innovative V6 TDI power plant from the Le Mans winning Audi R18 TDI was honored by a special interest magazine.
Distinguished start: a first award goes to Audi Sport to start the year. A panel of judges for the trade journal Race Engine Technology voted the Audi V6 TDI as ‘Race Engine of the Year 2011’. The particularly compact and lightweight power unit develops more than 397 kW (540 hp) and propelled the Audi R18 TDI last year. Audi won the 24 Hours of Le Mans for a tenth time with it.
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source:
https://www.audi-mediaservices.com/p...ewsletter.html
I think that the technical specifications of the engine (wide angle V6, exhaust inside V, single VTG turbo) influenced the decision, because the Peugeot V8 HDI engine is equally powerful and more efficient.