Porsche 918 Spyder: first electric drive through London

How can one of the fastest cars on the planet, drive silently through the streets of London emitting no noise or carbon dioxide? Follow Chief Driving Instructor Gordon Robertson as he finds out. The Porsche 918 Spyder will be on display at Goodwood Festival of Speed this weekend, visit http://goodwood.porsche.com/ #porschegoodwood *Combined fuel consumption in accordance with EU 5: 918 Spyder: 3.1-3.0 l/100 km; CO2 emissions: 72-70 g/km. Electricity consumption 12.7 kWh/100 km Panamera S E-Hybrid: 3.1 l/100km; CO2 emission: 71 g/km. Electricity consumption: 16.2 kWh/100 km