On this very special episode of Head 2 Head, presented by Tire Rack (http://www.tirerack.com), we present a hypercar battle for the ages: the McLaren P1 versus the Porsche 918 Spyder. Both of these cars have carbon fiber tubs and body panels. Both have small displacement, high revving V-8s packed between their passenger compartments and rear axles. Both use twin-clutch transmissions, carbon ceramic brakes, and active aerodynamics. Both have roughly 900 hp. Both are plug-in hybrids. And today, with the help of pro racing driver Randy Pobst, we find out which one is fastest around Mazda Raceway Laguna Seca! Read more here: http://www.motortrend.com/roadtests/exotic/1503_2015_mclaren_p1_vs_2015_porsche_918_spyder/ Subscribe now to make sure you're in on all the action! https://www.youtube.com/channel/UCsAegdhiYLEoaFGuJFVrqFQ?sub_confirmation=1 Facebook - http://facebook.com/motortrendmag & https://www.facebook.com/head2headshow Twitter - http://twitter.com/motortrend & https://twitter.com/head2headshow Google+ - https://plus.google.com/+motortrend/posts Instagram - head2headshow Website - http://www.motortrend.com