The most powerful race-spec 911, the GT3 RSR which is designed to compete in the GT2 class at international long distance races, has received a series of modifications for the 2009 model year. The updated 911 GT3 RSR features a more aerodynamic body, a larger capacity boxer engine as well as upgrades in the interior.
In the 2009 model, the capacity of the six-cylinder boxer engine has been increased from 3.8 to 4.0-litres delivering around 450HP at 7,800 rpm and a maximum torque of 430 Nm at 7,250 rpm. Power is driven to the rear wheels through a sequential six-speed gearbox. Other mechanical changes include the weight-optimised brake system and the lighter wiring harness.
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