
The diesel version of Audi's new R8 sports car will arrive as a 2009 model, according to a new report. It will most likely make use of the 4.2L TDI V8 that powers the Audi Q7, according to Car and Driver.The news follows a statement by Wolfgang Hatz, Audi's executive director of powertrain development, indicating Audi was considering offering a diesel version of the R8. Hatz made the comments to Italy's Quattroruote magazine back in October 2006.While many enthusiasts assume a TDI (Turbocharged Direct Injection) R8 would come with the immensely powerful 500 horsepower V12 diesel motor from the R10 race car, C&D says the powerplant is too heavy for a small mid-engine sports car.A more logical choice, the magazine says, would be Q7's 4.2-liter V8. It makes 22 percent less power than the standard R8's gasoline engine, but produces a whopping 77 percent more torque. What's more, all that toque (561 lb-ft) arrives at 1800 rpm, rather than 4500 rpm. The diesel R8 would also offer 22 percent better fuel economy.
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