As you might expect, the visual changes which set this X4 M Competition model apart from humbler X4s are predictably subtle. There are M-specific front and rear aprons. And your eye will be drawn to the vertically arranged and elongated side air intakes, framed by trim elements in high-gloss black, which is also used for the caps of the aerodynamically-optimised M exterior mirrors and the characteristic M gills integrated in the air breathers. You get big 21-inch wheels and, as with the M4, there's a multi-channel rear diffuser, which incorporates a pair of chrome tailpipes on either side.
Inside, there are M Sport seats which have electrically adjustable head rests and an illuminated M logo. The air vents have galvanised trim and the dashboard and doors get carbon fibre inserts. The M leather multi-function steering wheel features contrast stitching in the BMW M colours and an open 6 o'clock spoke. The key difference though, with the interior of this M Competition model is the re-designed control island on the centre console, which includes two extra buttons in addition to the M gear selector with its Drivelogic rocker switch: these being the BMW Controller and the red engine start button. As with other M cars, two individually configured versions of your favoured M drive set-up can be permanently stored and retrieved at any time using the two red M buttons on the steering wheel.
As with lesser X4 variants, you get the brand's 'Live Cockpit Professional' screen arrangement, with both instrument display and central monitor being 12.3-inches in size. The instrument display offers, amongst other things, an 'M View' with specific displays (adopted from the BMW M8). M-specific content is also available with the optional Head-up display. Otherwise, it's pretty much as with every other X4. Despite the sloping roof line, there's reasonable headroom in the back and comfortable space for a couple of adults. Plus you get a decently shaped 525-litre boot (25-litres down on the X3 version) which can be extended to 1,430-litres by folding the 40:20:40-split rear bench.