Here's a new review of the Porsche 918 Spyder, which is one of the most revolutionary race cars of the last years. The Porsche 918 Spyder is powered by two electric motors and a V8 engine, which together output a massive 718 hp. Porsche's 918 Spyder is able to get from zero to 62 mph in just 3.2 seconds and to reach a top speed of 320 km/h. And this is not even the impressive part. What's even more impressive is its efficiency. According to Porsche's official specifications, the 918 Spyder has a fuel economy of 94 mpg (3 l/100 km) and a 70 g/km CO2 emissions level.