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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.

2018 Kia Stinger vs. other luxury hatchbacks compared by the numbers

Ten years ago, if you had told us that one of the many new luxury segments to develop would be sedan-style hatchbacks, we'd have said you'd lost your mind. And yet, here we are today with not one, but four cars competing in just such a niche upscale segment: The Kia Stinger, Buick Regal Sportback, BMW 3 Series Gran Turismo and Audi A5. That's just in one size and price bracket. Two of the manufacturers listed here make larger versions of each luxury hatchback. We aren't entirely sure how it happened, but we're not going to complain, because we love the idea of a car with almost no compromise: luxury features, sporty performance, and plenty of practicality. Try Autoblog' s Car Finder to search for your next new vehicle. One of the reasons we're taking a look at these cars right now is that Kia has recently released pricing for its entry in the segment, the Stinger and Stinger GT. Buick wasn't far behind with the Regal Sportback and Regal GS, nor was Audi with the A5 and S5. So it seemed like an appropriate moment to look at the numbers and see which come out ahead or behind, with victors in each category highlighted with bold and underlined text. What we found when comparing these cars' statistics is that each one has a clear area of expertise. For performance, it's hard to beat the four-cylinder Kia Stinger and the V6 Stinger GT. The four-banger has the most horsepower of the four cars, and is just behind on torque. The V6 has the most power and torque among the six-cylinder versions. The Stingers are also the second lightest of the group when equipped with rear-wheel drive, though they fall to third with all-wheel drive. Space is a split between the Buick Regals and BMW 3 Series Gran Turismos. The Buicks have the most cargo space with the rear seats up or folded by a significant margin. The BMW on the other hand generally offers more space for passengers. It's up to you what's most important. Compare these and other potential new vehicle purchases using our tool. When it comes to cost, nothing can beat the four-cylinder Regal's base price of under $26,000. But if a V6 is what you're after, the Stinger GT is the cheapest. Neither matches the Audi A5 and S5 for fuel economy, though. Both Audis have the highest numbers for city, highway, and combined EPA estimates. Related Video:

Audi leading rival BMW in worldwide luxury sales race

If you thought competition among the German luxury automakers was hot before, it looks like things are just getting started. For the first two months of the year, Audi has sold more cars than BMW worldwide by just 383 cars.
Audi claims to have sold 242,400 vehicles through February, up 9.3 percent from last year, compared to 242,017 units from BMW, up 8.9 percent, in the same period. While the advantage is tiny, its implications could be huge because Bimmer has been the leader in the premium car segment for the last nine consecutive years. Mercedes-Benz lags behind them somewhat at 229,630 vehicles through February. According to Bloomberg, at this time last year Audi had sold 429 fewer cars than BMW.
The growth is all part of Volkswagen Group's goal to become the world's largest automaker. It currently ranks in second when its heavy truck businesses are considered. The German automotive giant also wants to be the world's leading premium carmaker. "Competition in the premium segment is more intense than ever," said Audi CEO Rupert Stadler to Bloomberg.