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2015 BMW M3 Sedan, M4 Coupe are officially revealed [w/video]

The new 3.0-liter inline-six makes 425 turbocharged horsepower from 5500 rpm all the way up to 7300 rpm.
BMW has announced the 2015 M3 Sedan and M4 Coupe, high-performance versions of the new 3 Series and 4 Series that launched this year. The new Ms have stirred controversy in a variety of ways, but one must remember that the M cars traditionally don't follow a specific mold.

BMW i3s traction control tech going in all BMW, Mini cars

The BMW i3s is essentially a warmed-up version of the i3 electric car we all know and love. The performance boost isn't huge — just 14 horsepower and 15 pound-feet of torque — but it also gets a new suspension, wheels and tires as well as an improved traction control system. We found the car to benefit from all the updates when we drove it for our First Drive Review, but now BMW has offered up more details on just how the traction control system of the i3s helps make it better to drive. The company says it'll expand the technology to all future BMW and Mini models as well. The i3s's system is calibrated to help it to pull away quickly from a stop, making full use of the instantaneous torque offered by the electric motor. It also improves stability when accelerating out of corners, when using regenerative braking and, of course, when the road conditions are less than ideal. The results are palpable, and with the other improvements the i3s definitely feels stronger off the line, as we found on our drive. It's also about a half-second quicker to 60 miles per hour, at 6.8 seconds. The secret is in the response time of the stability control, which BMW claims is 50 times faster than the conventional system. This is made possible by moving the control process into the powertrain itself, rather than a remote unit. This reduces the signal path and, thus, the response time of the traction control system. BMW's Head of Chassis Development, Peter Langen, said of it, "With their high levels of torque and instantaneous responses to every movement of the accelerator, electric motors already make significantly higher demands on driving stability systems than conventional power units." While engineered to make the most of the electric motor, BMW says the shorter cycles of this traction control system show promise for internal combustion vehicles as well. As such, we'll begin to see the improved technology applied across the BMW and Mini lineups going forward. Related Video:

BMW X4 M probably not in the cards

BMW is preparing to exploit its latest market niche - those that find themselves unable to choose between the 3 Series, 4 Series and X3 - with the X4. If you're looking for an M product, though, you'll remain limited to the 3 and 4 Series. BMW's Bernhard Ederer, at the Australian launch of the X5, told Car Advice he wouldn't "bet on it," when asked about a hotter X4.
Oddly, Ederer's reasoning, according to the Aussies, is out of concern for the X6 M, whose sales the X4 M would apparently cannibalize. That's like saying the M3 doesn't make sense because it will cannibalize M5 sales - the logic just doesn't really hold up. "The question is what customers are we talking to? And are we talking to someone that is willing and able to afford [an X6 M]?" Ederer told Car Advice.
Car Advice seems to feel the same way, claiming the X3-based X4 will share its powertrains with its donor platform, and will eventually spawn an M variant, albeit a few years down the line.