Vauxhall says that fuel efficiency improvements made on its Corsa small car will see it sell more sub-125g cars than any other model range in the UK next year.

It says the improved fuel efficiency of its powertrains mean they are on average 13.2 per cent more economical across the Corsa range with 5 out of 6 engines emitting less than 125g/km of CO2.

Vauxhall says the economy star of the range is the new 95PS diesel ecoFLEX model, which achieves 76.3mpg on the combined cycle (and 88.3mpg on the extra urban cycle).

But the firm adds that each of the Corsa's petrol engines is now more economical and more powerful. The 1.0-litre, for example, now produces 65PS (up 5PS), yet emits 117g of CO2, dropping it two UK VED (annual road tax bands) and meaning that owners now pay just GBP35 per year in road tax, down from GBP120, and none at all from next April.

Reinforcing the 98g, zero-VED ecoFLEX model in the Corsa's diesel range is a 75PS version of the same 1.3 CDTi, emitting 114g/km, and a more powerful 1.7 CDTi which now produces 130PS, yet drops 12g/km in CO2 emissions.

A new eco gearshift indicator housed within the instrument cluster is available on most models in the range.

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