Top 11 Cars that Qualify for Road Tax Exemption

We start our list with a perfectly capable albeit slightly dull car. The Vauxhall Astra is practical and stylish, with a well built interior, good driving position and a strong range of engines. The most economical one is the 1.7 CDTi ecoFlex - it returns 76mpg and emits just 99g/km of CO2. Strangely, the car is available in 108 bhp or 128 bhp guise, yet both return the same economy... we'd go for the most potent version.