The Berlingo’s 1.6-litre diesel engine in both 75 and 90hp variations has been rebuilt to improve CO2 emissions by as much as 6g/km.
In the 1.6HDi 75bhp engine, CO2 emissions now stand at 147g/km compared to 153g/km previously, while the more powerful 90hp unit offers 4g/km less emissions at 149g/km.
What this means for the buyer is a drop in road tax band from G to F – meaning a drop of £30 each year in VED.
The lower emissions will mean similar benefits for business users in terms of emissions-based company car tax.
Fuel economy figures for both engines have also been improved. The 75hp unit delivers 49.6mpg and the 90bhp engine offers a 1.7 per cent increase at 50.4mpg.
Robert Handyside, Commercial Vehicle Operations Manager, said: "Citroën continues to refine its Euro 4 engines to ensure its LCV customers benefit from fuel efficiency gains and emissions reductions."
However, the improvements in the engine technology will not add anything to the price of the small Berlingo panel van, which currently starts at £11,195.
The Citroen Berlingo van is available with the two above engines in X, LX, XTR+ and range-topping enterprise specification.
With 3.3 cubic metres of load space (a 3.7 cubic metres longbase version is also available), the Berlingo is a natural competitor to vans such as the Fiat Doblo Cargo, Ford Transit Connect and Renault Kangoo van.
The new Euro4 compliant Berlingo vans will be produced from October and will apply to all models thereafter.