With fuel prices always higher than we'd like, many drivers are weighing up their options when it comes to filling their tanks and asking: which is more economical – petrol or diesel?
Of course, when you choose what type of fuel your motor runs on, efficiency is only one factor. Car buyers also want to know how their vehicle will perform, how servicing costs are affected, and what the impact could be on resale values.
Many buyers believe that diesel cars represent better value. So are they right? How do petrol and diesel cars compare?