Porsche Cayenne S V8 4.5L 04-06 VRTuned.com August 19, 2009 Product Info 2 Comments Porsche Cayenne S 4.5L V8 The Porsche Cayenne S has a comfortable 4.5L V8 engine. Stock, the car makes 340hp to the crank. But for those using the Cayenne S as a daily driver or tow vehicle, you need...