With 128bhp, this 1.5 diesel has the same output power as the petrol 1.2 Puretech 130, but having even more low to mid-range shove makes it an effortless motorway cruiser. However, despite being more frugal than the petrol, you’d need to do a lot of miles to break even once its higher purchase price is taken into account. Its CO2 emissions aren’t that much lower than those of the petrols, either.