Formula One technology is not relevant enough to road cars according to Porsche.
The company announced last year it will return to the Le Mans 24 Hours in 2014 having considered but rejected entering F1.
Head of research and design Wolfgang Hatz told Autocar: “F1 was an alternative, but the road relevance is not there.”
“Also, there is a lot of publicity around politics and tires, but not so much about the engines and chassis. The aero, too, is incredible, but so extreme that it cannot result in any development in our road car understanding.”
Porsche’s decision comes after several car manufacturers who left F1 in the wake of the economic downturn have joined other racing categories.
Toyota and BMW, who left F1 at the end of 2009, are now competing in the World Endurance Championship and DTM (German touring cars) respectively.
Honda pulled the plug on its F1 program at the end of 2008. It now races in the World Touring Car Championship in addition to being an IndyCar engine supplier. There are rumours it is considering an F1 comeback with McLaren in 2015.
Porsche competed in F1 as a manufacturer team between 1957 and 1962, then returned as an engine supplier to McLaren from 1983 to 1987, and later made a brief return providing engines to Footwork in 1991.