In a study of over 5,000 cars across nine different categories, the Peugeot Bipper Tepee was voted the greenest with official CO2 emissions figures of 119g/km for its diesel model.
The worst MPV for polluting CO2 emissions was the Mercedes R63 AMG, which emitted three times more CO2 at 387g/km.
ETA named the 495g/km Lamborghini Murcielago as the worst polluting car in the survey and claims the emissions figure is the equivalent of cutting down a football pitch-sized patch of forest.
In contrast, emissions of 119g/km from the latest Peugeot Bipper Tepee are on par with a small family car and ensure it is exempt from first year road tax.
The 1.4-litre HDi diesel engine available with the Bipper Tepee and matched with a five-speed manual gearbox can return 62.8mpg on the combined cycle and has a top speed of 94mph.
A slightly less frugal 1.4-litre petrol model delivers fuel economy of 42.8mpg and 155g/km of CO2 emissions.
The Peugeot Bipper Tepee has been given five-stars by the ETA for its environmental credentials on its car buying guide.
Commenting on the awards for the greenest car, Andrew Davis, director at the Environmental Transport Association, said: “With the price of petrol at record levels and greater understanding about the threat to the environment there has never been a more important time to make fuel efficiency a deciding factor when choosing a car.”
The Bipper Tepee has already been recognised by electric vehicle conversion company Allied Electric, which has developed an electric MPV based on the Bipper Tepee called the eBipper.
While the eBipper costs an inflated £40,000, conventional, low-CO2 Bipper Tepee models start from £9,995 on-the-road.