Porsche decided to keep the production version of the 918 Spyder under wraps for now showing off instead the motorsport-inspired 918 RSR Coupe Concept at the 2011 Detroit Auto Show. Combining hybrid racing technology with a dramatic looking coupe body style, the RSR is every bit as impressive as the design study showcased last year at Geneva. For its motivation, the 918 RSR relies on a V8 gasoline engine delivering 563HP and a pair of electric motors producing a combined output of 204HP. Check out our gallery with live pictures from the Detroit show after the break or click here for more details on Porsche's conceptual racer. Read more »