"We are back in Detroit with a clear message," Porsche chairman Matthias Mueller said in announcing the new model.
"The Porsche 918 RSR impressively demonstrates the passion of our engineers and designers for developing the world's most advanced and best looking sports cars."
The latest car was unveiled in Geneva last year as a concept car, but the German automaker decided to put it into production due to strong interest.
The two-seater mid-engine coupe 918 RSR uses technology from the 911 GT3 R hybrid and the design of the 918 Spyder.
The luxury sports car maker saw a strong gain in sales in 2010. Some 95,000 cars were delivered to customers last year, a gain of 25 percent. This was mainly based on the new Panamera car line and the new generation of the Cayenne sporty off-roader.
German automakers are eyeing a larger share of the US luxury segment in a market expected to show solid growth this year, an industry spokesman said Monday.
Matthias Wissmann, head of the German Association of the Automotive Industry, told reporters at the Detroit Auto Show that the overall US car market is expected to grow 11 percent in 2011, to a total of 12.8 million vehicles.
"Last year in the luxury segment, the German brands built on their dominant position, pushing up their market share to 47.1 percent" from 45.5 percent in 2009, he said.
The big German carmakers - Volkswagen's Audi, Daimler, BMW and Porsche - are concentrated in the luxury segment. Last year they held 7.6 percent of the US market, up from 5.1 percent in 2005.