Mercedes-Benz A200 vs Abarth 500E

What's the difference?

Meet the world’s most aerodynamically efficient passenger car. Mercedes-Benz says the drag co-efficient for this new sedan version of its fourth-generation A-Class is the lowest ever measured for a passenger vehicle.

Which is quite a claim, but you only have to look at it to see how much work has gone into marrying good looks with slippery aero performance.

The A-Class sedan is substantially longer and fractionally taller than its hatchback sibling, but does that mean it’s better, or simply different?

Meet the Abarth 500e, the mad-hatter sibling to the very good and all-electric Fiat 500e, and the Italian brand's first attempt at a bonafide EV hot hatch.

It's tiny, tough and – despite the lack of engine and exhaust – it burbles manically when you fire it up.

So does this mean Italy’s pint-sized, petrol-powered icon has a future in the all-electric era? Let’s go find out.