The 4 starts at £19,495 for the PureTech 130 petrol motor in entry-level Elegance trim and prices rise to £25,495 for a BlueHDi 180 diesel in its more expensive Prestige format.

The slightly more costly Crossback is simpler still, a four-model line-up distinguished only by engine choices, starting at £21,745 for the petrol and finishing at £26,495 for the same automatic oil-burner.

Nic Cackett

Nic Cackett

Road tester
The residual values aren’t pretty for the DS4, with the Nissan Qashqai and the Jeep Renegade exceeding it significantly

That puts an awful lot of competition – in both hatchback and crossover format – as direct rivals.

For the basic £23,495 price of our BlueHDi 120 test car, you could variously consider the Qashqai 1.5 dCi, the Yeti 2.0 TDI and the Ford Kuga 2.0 TDCi. The entry-level Audi Q3 2.0 TDI, meanwhile, is less than £1000 more expensive than the priciest Crossback.

On CO2 emissions at least, the 4 makes for a worthy adversary. The BlueHDi 120, with a manual gearbox, emits 103g/km, making it the equal of the Renault-Nissan Alliance’s famously parsimonious 1.5 dCi.

Opting for the six-speed automatic incurs only a 5g/km penalty, too, thanks to its lighter and now more efficient design. Even the most powerful BlueHDi 180 emits only 115g/km.

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The pick of the range, though, may well be the BlueHDi 150, which remains at 103g/km despite the extra power and larger capacity. Unfortunately, you can’t have it with the Crossback.

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