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"   GENEVA \u2014 Talk about deja vroom. Audi got rave reviews earlier this year when it showed off a spectacular R8 concept with a hugely powerful twin-turbocharged V12 diesel engine at the Detroit auto show. That clean-power supercar was silver. And while not much has changed here at the Geneva Motor Show except the color, this red diesel R8 still makes 500 hp, racks up 737 lb.-ft. of torque, tops 185 mph and delivers 24 miles per gallon\u2014not too shabby.   So is this an all-new car? Did Audi make two of these concepts? In all honesty, one Audi insider told us here, engineers took back the car, painted it bright red and changed the name from R8 TDI to R8 Le Mans\u2014just to remind every journalist here that Audi has won the 24 Hours of Le Mans with a diesel-powered race car, won the ALMS championship for manufacturer, team and driver in the LMP1 class, and generally dominated prototype sports-car racing around the world. Our source says that Audi boss and VW board member Dr. Ferdinand Piech was the one who ordered the new name.   Either way, it looks great in red, and the body has been tuned up here and there to get the car ready for production. Exactly when that production might start\u2014and the price\u2014is anyone&amp;#039;s guess. But it won&amp;#039;t come cheap. \u2014Jim McCraw   RELATED STORIES \u2022 VIDEO: Audi Steals Detroit Show With R8 Diesel Concept   "^^<http://www.w3.org/2001/XMLSchema#string>
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