Vauxhall's new British-built Vivaro ecoFLEX Euro 5 panel vans, with CO2 emissions of 180g/km and a combined fuel economy of 40.9mpg, are in showrooms now.

Based on the short wheelbase standard roof models, but with some subtle specification changes, Vauxhall say the Vivaro ecoFLEX could save you over £800 in three years versus the 198g/km 37.6mpg standard version.

The figures result from a range of green technology features including exhaust gas circulation cooling and optimised gear ratios. There's also improved thermal management, low rolling resistance tyres and an aerodynamic kit.

For those wanting to save even more, Vauxhall offers Vivaro ecoFLEX Euro 5s equipped with a fixed speed limiter that yields CO2 levels as low as 174g/km and with combined fuel economy of up to 42.7mpg. Also for the first time there is an ecoFLEX version of the popular Vivaro 9-seater Combi for those who need to carry more than two passengers.

"The New Vivaro ecoFLEX Euro 5 gives our customers improved fuel economy and lower CO2s," said Steve Bryant, Vauxhall's commercial vehicle brand manager. "Fuel economy and green credentials are top priorities for our customers looking to reduce running costs and the carbon footprint of their vehicles or fleets."

The best-selling Vivaro is top of its segment at retail with 3,531 registrations so far this year.