Every car on the market comes with a fuel economy figure most commonly expressed in miles per gallon or, if you’re buying a grey import, sometimes litres per 100km. The tests have been around for over 30 years and no…

Manufacturers quote a figure that indicates how fuel-efficient their cars are. Usually this is expressed in miles per gallon, but on some Japanese imports you might see litres per 100km or kilometres per litre. The figures are given as three…