Porsche 918 Spyder Hybrid Concept May Actually Head To ProductionWes Siler3/02/10 8:20am69EditPromoteGo to permalinkThere's a lot we don't know about the hybrid Porsche 918 Spyder concept. Is its 500 HP combined or gas-only? Does performance really tail-off as charge runs down? So what do we know? Porsche might actually build this.