BMW i5

Before we delve into the various strengths and weaknesses of the BMW i5, let’s rewind. After all, executive saloons have over previous decades gained a reputation for conservatism that, while hard to shake, is now entirely unjustified.

Twenty-five years ago, company car buyers wanted efficient diesel engines in packages priced and equipped just so. They didn’t want expensive powertrain technology. They didn’t even want riskier shades of paint.

At the time, BMW played to that brief spectacularly well. But now the executive car market has changed out of sight, under the pressure of CO2-based tax regimes.

And how the BMW 5 Series has changed along with it. The eighth generation of this mid-sized four-door is taking another bold step into the future. Incorporating updated versions of the mild- and plug-in hybrid powertrains of its predecessor, but casting out their diesel engines entirely, it is the first 5 Series to be offered as an all-electric model.

The zero-emissions i5 – the subject of this test – will be available in both saloon and Touring guises, and with a choice of single- or dual-motor powertrains.