Smart: Smart for Two ED
Cost: £27,895 (inc £5,000 Government incentive)
CO2 emissions: 49g/km
Fuel efficiency: 134.5 mpg
Road Tax-exempt: Yes
Toyota's innovative Prius has been on the market for a while – even making an appearance on the red carpet. The car runs from both a petrol engine and electric motor. The latest model includes the ability to plug the car into a domestic electricity supply and charge it up in just an hour and a half.
The Prius is one the greenest and cleanest cars on the market with manufacturers claiming 134.5 mpg and CO2 emissions of just 49g/km. Results like this make the running costs very low cementing its position as one of the market leaders.