R15 TDI Plus
In response to losing the 24 Hours of Le Mans and the Petit Le Mans to the Peugeot 908s, Audi updated their R15 for the 2010 season, creating the R15 plus. 2010 Regulations reduced the size of diesel LMP1 air restrictors and turbocharger boost pressure. However, despite this Audi's engineering team led by Ulrich Baretzky were able to achieve engine power and performance that was comparable to the 2009 powerplant. Aerodynamic efficiency was also a major area of focus for 2010. The frontal area of the car was redesigned to reveal the raw crash structures. The front fenders were also lowered in an effort to reduce drag while the concept of air running through the car was abandoned for a more conventional design. The air channel that exited to the side of the car was redesigned resulting in a more conventional configuration, and a new headlight concept was introduced. Audi stated that they had improved the fuel tank and cooling system as well.
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