McLaren P1 v Porsche 918 Spyder. Which is fastest? evo Track Battle

The McLaren P1 and Porsche 918 Spyder are two of the quickest supercars on the planet. But which is the fastest around the spectacular Anglesey Circuit? evo’s Jethro Bovingdon attaches the Vbox timing kit and finds out.... NEWSTAND: SUBCRIBE: FACEBOOK: TWITTER: