The Department for Transport (DfT) has today improved the Act on CO2 website - http://www.direct.gov.uk/actonco2 - to provide a car search tool that can be used to compare CO2 emissions and annual running costs on all current editions of each make and model.
Transport minister Andrew Adonis said: "I hope this will encourage individuals and businesses to look for an economical car whilst supporting the industry and stimulating widespread environmental change."
The new tool highlights the annual running cost savings that can be made by comparing editions with the most fuel-efficient car in that specific category.
Drivers could potentially save up to three months' worth of fuel each every year, by choosing the most efficient car for their needs.
The website also highlights a number of tips for smarter driving, which enable drivers to save money, fuel and reduce CO2 emissions.
These include driving at a measured speed, not overloading car boots and keeping tyres pumped up.
In addition the site shows how to limit fuel wastage, by not leaving engines idles and not over revving.
With the search tool, DfT is also launching a new advertising campaign to promote Aact on CO2's 'save money, save fuel' message.
The campaign will highlight the CO2 and financial savings that can be made by choosing a more fuel efficient new car.
Visit the CO2 comparison website here.