The BMW M340i xDrive is getting a diesel-powered brother. The M340d is slightly down on power compared to the petrol model, but it packs a torquey punch.
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BMW will expand into diesel for its sub-M 3 Series range, with the reveal of the M340d xDrive ahead of its in-person debut at the Geneva motor show.

Sitting alongside the M340i xDrive, the M340d is powered by a 3.0-litre inline-six engine augmented by a 48V mild-hybrid system. At least, it will be in Europe – BMW says there are "no plans" to bring it Down Under.

It promises 250kW, down just 35kW on its petrol stablemate, but packs a whopping 700Nm – 200Nm more than the petrol can manage.

Above: The M340i xDrive from behind the wheel.

The car's 48V starter/generator contributes an additional 8kW under heavy throttle, and allows for smoother start/stop in a wider range of scenarios than a conventional setup.

Both wagon and sedan bodies will be offered abroad. The sedan can hit 100km/h in as claimed 4.6 seconds, while the wagon takes 4.8 seconds.

The M340d xDrive will get a full reveal at the Geneva motor show next month.

Is the M340d xDrive coming to Australia?

A BMW spokesperson said there are "no plans to bring the M340d xDrive here at this stage".