StateSideSupercars posted a spy video on YouTube which, as their description says, is believed to show the upcoming 2018 BMW X5 M50i. This model will be the petrol equivalent to the X5 M50D and will sit between the X5 and the X5M.
The car is estimated to have around 500 horsepower and 500 lb-ft of torque coming from a V8 engine.