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Pure black BMW i8 hydrogen fuel cell prototype on the track

Largely coated in matte black paint with just a few touches of dark blue contrast, the BMW hydrogen fuel cell-powered i8 prototype looks stealthy just sitting still. Now, that ninja-like styling is taking to the track in this video to prove that its performance doesn't come with much noise. The quiet hum of the tires and an odd whir from the rear are all that you hear coming. As this i8 prototype picks up speed around the circuit, the sounds that the drivetrain makes just get weirder. When moving slowly, you can pick out the usual whine that's expected from conventional electric vehicles. However at higher velocities, the coupe almost makes a noise like its constantly exhaling. Along with the recently unveiled BMW 5 Series Gran Turismo hydrogen-fueled concept, this sneaky looking i8 is part of BMW's technological push to become a greener automaker. The company is also prototyping a turbocharged engine with water injection and new plug-in hybrid powertrains. Although this low-slung coupe is by far the most attractive of that bunch. We might not be too far away from actually seeing this tech on sale on models bearing the Bavarian brand's roundel, either. Thanks to collaboration with Toyota, the company wants to have fuel cell components ready by 2020, and sales could start early in the decade. Hopefully all of the company's FCEVs look as menacingly great as this i8 by that time, though.

BMW 1 Series prototype packs direct water injection

Just a few months ago, BMW showcased an M4 that was modified to serve as the safety car for the MotoGP racing series. The flashing lights and emergency equipment, however, weren't the only modifications BMW made to the performance coupe. It also packed an innovative new water injection system. And now it's furthering the development of that system by running it in a 1 Series hatchback as well. Revealed at the BMW Group Innovation Days 2015 event, this five-door 1 Series packs a three-cylinder gasoline engine – like the one found in a Mini or i8 – but fitted with the direct water injection system. In this application, the system sprays a fine mist of water – yep, regular old H2O – right into the combustion chamber. While mixing water with gasoline normally wouldn't be recommended, in this case it evaporates immediately and helps cool the engine from the inside, allowing it to run at higher efficiency. That cooler running engine brings with it several benefits. It delivers improved fuel economy and lower emissions, to start. It also allows for an earlier ignition point, higher compression ratio, and higher boost pressure in turbocharged engines, delivering increased output. It even cuts down on engine knocking (where combustion occurs spontaneously), reduces wear and tear on the engine, and makes better use of lower octane levels. If that sounds like a win-win-win... win (we're losing count of all the wins here), it's because BMW just may be on to something. Of course it does require a water tank to be fitted on board, which means added weight, but instead of requiring the driver fill up the water tank, BMW has fitted this prototype with a system that replenishes the water level from the air conditioning system when the vehicle is switched off. So unless it's being driven in a particularly extreme climate, it doesn't even need topping up. Add one more "win" to the list, then. Extra power, improved real-world fuel economy: Direct water injection enhances efficiency. With direct water injection for turbocharged petrol engines, the BMW Group has again succeeded in enhancing the capabilities of conventional engine technology through an ongoing process of refinement and improvement. The precisely controlled injection of water into the engine cylinders produces a cooling effect that boosts power and torque, particularly when operating at or near full throttle, while at the same time reducing fuel consumption and emissions.

Next BMW X5 caught testing in the snow

That's not taken long at all. Less than three years after BMW introduced the current X5, the German automaker has already kicked off winter testing for its replacement. The new Sport Activity Vehicle (that's BMW for crossover) has been spotted in snowy terrain, complete with heavy camouflage and extra driving lamps. Now, this is a mule, which means we're absolutely not looking at production sheetmetal. Instead, we'd wager the next X5 is hiding well beneath this swirly camouflage. Compared with images of the current car, it looks like we're seeing a longer front overhang, a shorter rear overhang, and a tighter dash-to-axle ratio. That makes us think the next X5's exterior dimensions might be just a smidge smaller than the current model. And that gels with at least some of what our spies are telling us. For one, they're reporting that the new X5 will be significantly lighter, as is the trend nowadays. It will also be more comfortable and techy, both of which would put it in line with the new 7 Series. Beyond that, though, we're in the very earliest days of BMW's next SAV. The debut of the fourth-generation X5 will likely come in 2018 as a 2019 model. Related Video: