We all need to make our money go as far as possible. No matter how good a deal you get, if a car drains your account every month it has no future for you. To make your cash go furthest, think small. Eleven of our top 15 here are city models or superminis. And the Toyota finishes head and shoulders above the rest. As the only one of the Aygo/Peugeot 107/Citroen C1 trio with a sample size substantial enough for inclusion in Driver Power, its success is down to a tiny 1.0-litre engine which returns 62.8mpg and 106g/km CO2 emissions, making for minuscule tax bills. Second place also goes to a Toyota. The Prius has never managed to achieve impressive economy figures in our tests, yet owners tell us they are reaping the financial benefits of hybrid ownership.