Which used Smart Forfour Hatchback hatchback should I buy?
A wide range of engines means there's a lot of choice. Petrols include 1.0, 1.1, 1.3 and 1.5 versions, and they all give decent performance, with outputs ranging from 64bhp for the 1.0 to 109bhp for the 1.5. The 95bhp 1.3 is the one to avoid. While performance is fine, it sounds too coarse.
There's also a Brabus performance car, which uses a tweaked 1.5 to give 177bhp. It's very quick, beating a Volkswagen Golf GTI to 60mph, but it's also very expensive.
Diesel fans can choose from two versions of the same 1.5-litre turbodiesel, one giving 68bhp and one giving 95bhp. Both are pretty good, but we'd choose the more powerful one. It's a bit more expensive, but worth it for the extra power you get.
Whichever you choose, try to find one with a regular manual gearbox, because the semi-automatic 'box is too jerky in full auto mode.