At the British International Motor Show Ford will unveil a new addition to its ECOnetic range, the Ford Fiesta ECOnetic , which the company claims will offer the best CO2, fuel economy and value of all four-cylinder, four-seat cars on the market.

"The British motor show is scheduled to bring half a million car enthusiasts to Ford’s East London heartland," said Roelant de Waard, Ford of Britain chairman and managing director. "They will see new Fiesta, with sporty Zetec-S and frugal ECOnetic variants on the stand. Many will pass our wind-powered Dagenham plant on the way, where annual production will top 1,000,000 engines this year in response to the shift to eco friendly models."

While details have not been confirmed, the Fiesta ECOnetic is expected to be powered by a small diesel engine that emits less than 100g/km of CO2, placing it in the lowest VED road tax band A, which is effectively free.

The new model will likely make use of low rolling resistance tyres, low friction transmission fluid, and revised gear ratios in its bid to reduce emissions to a minimum.

More details in the coming weeks.