Nissan has tweaked the gearbox on the Juke crossover to cut road tax by up to £20 per year and improve fuel economy in petrol and diesel versions.

Running costs are lowered thanks to revised gear ratios in the manual transmission offered with the British-built Nissan Juke, but prices remain the same on affected models.

The 1.6-litre petrol engine and 1.5-litre dCi turbodiesel engines are both cheaper to run than before, according to official fuel economy figures.

The petrol delivers 139g/km - enough to cut £15 off the cost of road tax as it drops into Band E (£115 per year). It also means an improvement of 2.3mpg in fuel economy to a new figure of 47.1mpg.

Meanwhile the diesel option drops further to Band D of road tax and just £95 per year thanks to CO2 emissions of 129g/km. Fuel economy in the 1.5-litre diesel Juke is now 57.6mpg.

The Juke, a compact crossover which matches the design of an SUV with a small hatchback, has proved to be a popular car with UK buyers thanks to its eye-catching styling and low running costs.

The prices remain unchanged, meaning 1.6-litre petrol versions start from £13,395 in the entry-level Visia specification.

The 1.5-litre diesel is also available in Visia with prices starting at £14,795. Both are two-wheel drive models - a four-wheel drive version is only available on the high-spec Tekna trim and comes with a CVT gearbox.

Nissan says 22,000 have been sold in the UK since it went on sale towards the back end of 2010. As a relatively new car, the gearbox tweaks are the only changes to the Juke this year with a mid-range update not expected for another two years at least.

Askaprice.com holds a wide range of manufacturers and models at the new car quotation website helping you get the best new car deals available in the UK, free of charge. That means you can compare Nissan prices and get the best Nissan Juke quotes around.