Skip advert
Advertisement

BMW boosts X4 M40i crossover with M4 engine parts

BMW's 'Sports Activity Crossover' gets a little more active thanks to M Performance fettling

Like it or lump it, crossovers sell. Performance crossovers also sell, which has led BMW to release the latest variant of its sporty X4, in M40i trim.

As the name suggests, the new car follows a similar path to that of the M135i – while not a full-fat M Performance model, BMW M GmbH is still responsible for development, elevating the car above humbler models and those simply wearing M Performance parts.

Advertisement - Article continues below

At the M40i’s heart is a 3.0-litre TwinPower Turbo inline-six from the xDrive35i (a model not sold in the UK), but a forged steel crankshaft, new piston rings, improved crankshaft bearings and high-power spark plugs from the M3 and M4 – and increased boost for the turbocharger – enhance performance.

Maximum power is now 355bhp between 5800-6000rpm, with 343lb ft from 1350-5250rpm. Those are improvements of 55bhp and 43lb ft over the standard 35i, resulting in a 4.9 second 0-62mph sprint and 155mph limited top speed. BMW quotes fuel economy of 32.8mpg and CO2 of 199g/km.

Those in turn are aided by a standard eight-speed Steptronic automatic transmission and launch control, with steering wheel-mounted paddle shifters to bump up the interaction. Naturally, all-wheel drive is standard too, with Performance Control to distribute torque between the rear wheels.

Exterior styling features the usual M Performance cues. X4 M40is ride on 8.5x19 front wheels and 9.5x19in rear wheels, wrapped in Michelin Primacy runflat tyres of 245/44 width and profile at the front and 275/45 at the rear.

Michelin Pilot Super Sport tyres are also available, providing the buyer selects the optional two-tone, 20-inch double-spoke alloy wheels. Larger brakes are standard regardless of wheel choice.

A new body styling package adorns the M40i, with grey-painted door mirrors and kidney grille elements, as well as the intakes in the new front apron. A pair of chrome black tailpipes defines the rear end. An exclusive colour – Long Beach Blue metallic – also joins the M40i options list.

Inside, the M-goodies continue, with X4 M40i lettering on the door sills, an M leather steering wheel and M logo on the gear selector. Equipment levels are predictably high, with various fabric and leather upholstery options, navigation, and safety features like active cruise control and city braking.

Pricing and release date details are yet to be confirmed.

Skip advert
Advertisement
Skip advert
Advertisement

Most Popular

Porsche 718 Cayman GTS 4.0 (2020 - 2025) review – a near-perfect mid-engined sports car
Porsche Cayman GTS 4.0 – front
In-depth reviews

Porsche 718 Cayman GTS 4.0 (2020 - 2025) review – a near-perfect mid-engined sports car

Porsche has killed the 718, and with it the sublime Cayman GTS 4.0. It goes out as one of the best all-round sports cars ever made
26 Feb 2026
The new Audi RS5 looks good, but these used fast estates cost a fraction of the price
Used fast estate cars
Best cars

The new Audi RS5 looks good, but these used fast estates cost a fraction of the price

The new RS5 Avant is a hit, but if you don’t have £90k to spare these used alternatives offer impressive performance at a fraction of the price
27 Feb 2026
They might be cheap, but Chinese cars may carry an expensive catch for UK buyers
Xiaomi SU7
News

They might be cheap, but Chinese cars may carry an expensive catch for UK buyers

The rapid expansion of new Chinese cars on sale in the UK is causing problems for insurers with uncertainty over parts availability and repair costs c…
26 Feb 2026