The future Mercedes-Benz GLC Coupé rival has a familiar exterior design to the current car, with the same four-door body and steep swooping roofline, but underneath it’s built on an all-new platform.
Shared with the upcoming X3, which is due for launch this summer, the X4 will sit on BMW’s Cluster Architecture (CLAR) structure, using a mixture of high-strength steel and aluminium, increasing structural rigidity while saving weight.
The X4 will also share engines with its smaller SUV sibling, but in the UK they’ll likely be restricted to the diesel options, starting with a 2.0-litre four-cylinder and topping out with 3.0-litre straight six.
The M40i pictured here is unlikely to make it to Britain, so the hottest X4 available will use a six-pot diesel and be named the xDrive35d M Sport. Expect it to have headline figures that surpass the current car’s 309bhp and 465lb ft.
Sources believe BMW will launch an X3 M and so that an X4 M may also be produced, using the same turbocharged 3.0-litre straight six petrol engine with around 425bhp - as it does in the M3. The X4 M would compete with the GLC 43 Coupé and Porsche Macan Turbo.
BMW has plans to integrate an all-electric powertrain into the X4, but this won't happen until later in the model's lifecycle at the start of the next decade.
Inside, the future X4 will get the usual raft of new BMW technical features that are centred around a 10.3in screen and accompanying iDrive controller. The infotainment has voice control and can be specced with a head-up display and gesture control technology.
The next X4 will arrive in the second half of 2018, barely four years after its predecessor was launched. This swift turnaround is linked to the launch of the next X3.