Panelists have selected another green car this year for the accolade of Car of the Year 2012. This time it is the Vauxhall Ampera. The Ampera is an electric vehicle with a petrol driven generating unit that charges the battery once it runs out of charge. The Ampera can run on battery for around 40 miles and this is within the average commuting distance for your average commuter. Total range is around 380 miles.