The new Ford Fiesta ECOnetic will be unveiled at next month's London motor show, a company source has revealed.The ultra-efficient, stylish Fiesta hatchback will produce less than 100g/km of CO2, equivalent to more than 70mpg, pitching it directly against the VW Polo Bluemotion as the most fuel-efficient family car in the UK.The new Ford Fiesta weighs around 50kg less than the previous model and will be powered by a 1.4-litre turbodiesel engine, built at Ford's wind-powered plant in Dagenham.The production-ready Ford Fiesta, which was revealed at the Geneva motor show in March, bears a striking resemblance to the Verve concept car, though it has not retained the frameless doors of the concept.
