The market for superpowered cars with better fuel economy is about to grow: BMW quietly confirmed diesel engines for a number of cars in its M product range, which may open the door to diesel-powered X5 Ms and X6 Ms.

The press release claims that the M brand will get "a new product range" that will "offer exclusive engine variants" and that BMW's xDrive all-wheel drive system will "also play a significant role" in the new models. Look a bit further down the release, and BMW says that it will release "a range including a wide variety of model series, as well as both petrol and diesel -engined variants."

What does this mean? We're taking it as a tacit confirmation that the rumored diesel-engined M cars will be unveiled early this year. As we've previously reported, there was talk of a M550 dX sedan and wagon, as well as the possibility of an X5 dM and an X6 dM to follow. It certainly sounds like one or more of these will make it to showrooms, especially considering that BMW has already teased what looks like an X6 dM on YouTube.

To recap, that engine has been rumored to be a tri-turbo 3.0-liter inline-six-cylinder diesel engine, which pumps out 381 horsepower and 516 pound-feet of torque, and sends its power to all four wheels. It's obviously less than the power output of the M5, X5 M, and X6 M, all of which make at least 550 horsepower, but it would almost certainly dwarf the gas-powered super sleds' fuel economy numbers.

Expect to see much more information about these cars when they are revealed -- alongside the production-ready M6 -- at the Geneva Motor Show in March.

Source: BMW