Not a name you will regularly hear on TheGreenCarWebsite.co.uk, Porsche is nonetheless making the green car headlines today as it releases details of its research into electric transportation. … The concept study of the 918 Spyder sports car with plug-in hybrid combines high-tech breakthroughs in engine technology with electro-mobility. Emissions levels stand at a tiny 70 g/km CO2 with three litres fuel consumption for every 100 kilometres (equal to 94.1 mpg). …