6. Porsche 918 Spyder
Complex Says: A total of 918 Porsche 918 Spyders will be built starting this year. The production version will be similar to the 718hp hypercar that got 78mpg and went from zero to 60 in 3.2 seconds. The mileage from press releases of plug-in hybrids and the actual EPA ratings have differed greatly in the past, so we're still skeptical regarding that figure.