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BMW reveals M4 safety car with innovating water injection system [w/video]

Racing series don't just pick their safety cars at random, or use just whatever car is lying around. These days the car that sets the pace at the front of the pack is typically provided through consideration by a sponsor. In the MotoGP series, that's BMW and its M division, which have served up the Official Car of MotoGP since 1999. What you're looking at is the latest, and it packs some innovative technology on board. Aside from the matte black wrap with BMW's iconic striped livery, upgraded aero kit, retrofitted interior and emergency equipment, this BMW M4 coupe packs a new injection system under the hood. Only instead of injecting fuel, it injects water into the combustion chamber – something that wouldn't usually be recommended, but BMW insists actually aids in the combustion process. The idea is that the temperature of the air being mixed with the fuel inside the engine is usually hotter than ideal, so the system injects a fine mist of water into the collector in order to reduce the air's temperature... sort of like one of those hydrating misters at an amusement park or outdoor mall, but in an even hotter environment. The system brings the temperature of the air down to a more optimal temperature, helping it combust better. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. Whether that eight percent is worth the added weight of the system – particularly with water pump and a 1.3-gallon tank in the trunk – is up for debate. But we'd imagine that the Bavarian engineers have weighed very carefully. Of course there's also the matter of refilling the water tank, which BMW says would be carried out whenever the safety car is refueled, but in real-world conditions would only necessitate attention once every five top-ups at the gas station. By now you might have guessed that BMW probably didn't develop this system just for the MotoGP safety car, and isn't planning on keeping it confined to the racetrack. Instead it's being tested and demonstrated on the safety car before being rolled out on production models in the future.

BMW M models will stay rear-wheel drive as long as possible

Don't expect BMW's M cars to go soft any time soon. Carsten Pries, the division's head of product management, wants to focus on at least six cylinders and rear-wheel drive for as long as possible. Pries sees the combination of six (or more) cylinders and rear-wheel drive as defining features of the division. "These are cars that attract new people to the M brand and that is very important," he said to Motoring. He doesn't think it's time to deviate from that strategy yet. "I hope not, because six is part of our DNA. Not only the power, but that hallmark sound that we have." We certainly like Pries' sentiment, but the division's current lineup shows a willingness to compromise the purely rear-wheel drive focus when necessary. For example, the latest X5 M and X6 M already feature all-wheel drive systems, which can send 100 percent of the power to the back at times. Spy shots and rumors heavily suggest a similar option for the next-generation M5, too. The latest M4 GTS proves BMW knows how to tune a fantastic sounding six-cylinder, but there's no reason a well engineered four-cylinder model couldn't be great. The original M3 relied on one to speed around, and it became a performance icon of its period. Pries even admitted in 2014 that a new four-cylinder M vehicle could happen eventually. For now, he isn't ready to introduce a new four-pot model. Pries admits that the division's strategy might need to change someday, but he still expects to create M-badged models. "If the framework changes in the future, we have to look then at what we can do in terms of a proper or decent M offer," he said to Motoring. Related Video:

Mercedes G63 vs. BMW i8: Our silly drag race between the past and future

You see, we were just trying to conserve resources. We had Milan Dragway rented for a test of the AMS Alpha 10 Audi R8, and there was some extra track time, so we brought these two along. That's called saving money. Or something. Aside from being German, the G63 and i8 couldn't really be much more different – one is a prehistoric military vehicle with a nutty twin-turbo V8, the other a vision of the near future of efficient sports cars. So what did we do? We lined them up against each other, editor-in-chief Michael Austin in the i8 and me in the G-Wagen. Though we had a good idea of the likely winner – note which car the boss is driving – the results were still surprising. Watch for yourself above. Green Humor BMW Mercedes-Benz Coupe SUV Hybrid Luxury Performance Videos Original Video drag race milan dragway