Hey Prius drivers, ever laugh at a Porsche owner and think "I'm saving so much more gas money than that guy." With the 918, your gig is up. The $850,000 supercar promises a 0-60 time of 3.1 seconds. With a hybrid engine, it also promises a top speed of just under 100mph when just the electric motor is humming. Porsche R&D chief Wolfgang Dürheimer's pet project in a single word: Impressive.