Which? says petrol cars may be cheaper to run than diesels

The consumer organisation, Which? says the overall running costs of petrol cars may be lower than their diesel equivalents.

This year is set to be the first in which diesel cars will make up more than half the new car market. However, a Which? comparison of diesel and petrol versions of six popular car models has found that petrol engines can often be the more cost effective choice for drivers covering a typical annual mileage.