Volvo will unveil a high-efficiency variant of its C30 small family car, called the C30 Efficiency.
The C30 Efficiency is powered by a 1.6-litre turbodiesel, but by incorporating a range of aerodynamic tweaks, introducing higher gearing and improving powertrain efficiency, the car can achieve 62.8mpg on average and carbon dioxide emissions of less than 120g/km.
That compares with the 57.6mpg and 129g/km of carbon dioxide of a conventional C30 1.6 D.
With its sub-120g/km emissions, the C30 Efficiency is Volvo's first car to fall into VED tax band B.
The C30 Efficiency has a new roof spoiler, rear bumper and 16-inch wheels.
The gearbox has higher gearing in third, fourth and fifth gears, while low-friction tyres and transmission oil help to improve efficiency and decrease emissions.
The C30 Efficiency will be on sale here next year, although there's no word yet on exactly when.
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