Porsche 918 Spyder Hybrid: 500 HP, 78 MPG - Supposedly makes over 500 HP and returns 78 MPG thanks to a 3.4-liter V8 and three electric motors, very fuel efficient...
The whole shebang, complete with bateries, weighs just 3,285 Lbs. That's seriously light for something packing heavy batteries... Price £500k and then some.
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