BMW introduced the original X4 for the 2015 model year, but the company dropped the second incarnation of the machine earlier this year. So we should get to see the M incarnation of the high-riding model by next March.
Riding on the CLAR modular architecture that has spread throughout the BMW range, the new X4 is stiffer, which means the M Division engineers have had a better handling base to work on.
As for the motivation, this will come from a new 3.0-liter straight-six. Codenamed S58, this is expected to use twin turbos and receive a certain degree of hybrid assistance.
The unit will be shared with the 2019 BMW X3 M, as well as with the 2020/2021 BMW M3, both of which have already been spied (you can find the resulting media behind the links).
The motor is expected to deliver at least 450 horsepower, even though the 500+ horsepower models in this segment meant we could see the output starting with a "5". And we're referring to machines like the Mercedes-AMG GLC63 Coupe or the Alfa Romeo Stelvio Quadrifoglio.
And since BMW has hinted that it could expand the Competition models to include its SUVs, we might even receive a BMW X4 M Competition in the not-so-distant future.