With two full seasons under its belt, Porsche continues to develop its 3.4 liter LMP2 engine. It has been refined for increased drivability and efficiency, and from Lime Rock of 2007 on, has been calibrated for the ALMS specified ethanol fuel blend. The engine features four valves per cylinder, a dry sump lubrication system and an air intake manifold with single cylinder throttle valves. The endurance racing engine is compact, light weight and designed with a very low center of gravity. It is integrated into the chassis as a structural part.

The engine is mated to a Porsche-engineered sequential six-speed constant mesh transmission that is operated by a paddle shift system on the steering wheel and incorporates a triple disc carbon fiber racing clutch.

The 2006 Porsche LMP2 was commissioned by Porsche Cars North America and was the first prototype race car Porsche has designed and constructed since the 1998 24 Hours of Le Mans winning Porsche 911 GT1.