The quirky, Mercedes-owned Smart ForFour hatchback offers a slightly more premium alternative in the diminutive city car segment, one with four useful seats and a little bit more boot space than its smaller ForTwo sibling. Comparatively expensive as a new car, tidy low-mileage used examples can be found for around £5,000, making them a solid first car consideration or a relatively practical second family car. But with the Renault Twingo, Fiat 500 and Volkswagen Up! also in the running, the Smart car faces stiff competition.