Currently reading: Does a £4000 upgrade make the Polestar 4 a true super-saloon?

We pitch our 4 against the full-fat Performance version to see which is the pick of the range

The super-saloon class has, in recent years, been dominated by the Germans – and, to a lesser extent, the Italians.

Upstarts such as Polestar are hoping to muscle in by taking the familiar recipe and making it ‘fusion’: get hold of a big, comfortable saloon with a plush interior and supercar power, just like mama used to make, but instead of fitting a straight six, a V8 or a V10, bolt an electric motor to each axle.