Held in the UK's picturesque Cotswolds, the MPG Marathon will take place on October 8 and 9. There have been several electric vehicle entrants already, including the Renault Zoe and a Nissan LEAF. Drivers will have to plan their recharging points carefully if they want to finish first in their class, as the route spans 360 miles (580 km) across the rugged terrain of the Brecon Beacons.
Entrants will be judged on a range of criteria, including how much power they consume over the course of the marathon. Electricity will be measured at 13 pence per kilowatt hour, while any carbon fuel that the petrol or diesel hybrid vehicles consume will also be taken into account.