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BMW already considering four cylinders for next M3

The cylinder count in BMW's M3 has fluctuated over the years. The original M3 debuted in 1985 packing a 2.3-liter inline-four, but subsequent models went with sixes until the outgoing generation upped the cylinder count to eight. With its latest model, BMW has dropped back to six cylinders with a pair of turbos taking the place of the extra pistons. But the next M3 sedan and M4 coupe could go back to the model line's roots with a four-cylinder engine.
Speaking with BMW M product manager Carsten Pries at the launch of the latest M3 and M4 in Portugal, our Aussie compatriots at Motoring.com.au report that "you could see a future [M3] powered by a four-cylinder engine." Offsetting the reduction in cylinders, the lighter engine would benefit the vehicle's weight and balance, thus enhancing performance.
We wouldn't expect the next M3 and M4 to lose any power in the process, though: Output in the M3 has only risen over the generations, from 192 horsepower in the four-pot original to 282 hp in the six-cylinder E36, 338 hp in the six-cylinder E46, 414 hp in the V8 E90 and 425 ponies in the new turbocharged six-cylinder F80 model. With that latter model having just debuted, it'll likely be a good six or seven years before the next version comes along, giving BMW plenty of time to settle on an engine - however many cylinders and turbochargers it has. In the meantime, you'll have to forgive us for taking a romp down M3 memory lane in the fresh gallery of images above.

BMW shows up-armored X5 concept and we can't get near it

BMW has brought a slightly different concept vehicle to the 2013 Frankfurt Motor Show. Rather than something that foreshadows a future product or a new design direction, the Munich-based manufacturer has brought an X5 that's designed to be shot at. It's called the Concept X5 Security Plus. The Concept X5 name is a bit misleading, though. It's based on the 2014 X5, while BMW already builds an armored CUV, called the X5 Security. The concept tag has to do with the "Security Plus" part.
Engineered to be compliant with VR6 security standards - the current X5 Security is for VR4 standards - the Concept X5 will quite happily shrug off direct attacks from an AK-47. Thanks to sealed joints, high-strength steel moldings, high-performance steel body panels and special, polycarbonate-coated security glass, Kalashnikov's finest, whether used as a firearm or as a melee weapon, would be useless against this X5.
Built alongside the standard X5 in BMW's Spartanburg, SC factory, the X5 is shipped to a BMW facility in Toluca, Mexico for installation of the armor and security features. The company claims this delivers a more thoroughly engineered protective solution than aftermarket retrofitting.

Tesla in talks with BMW about batteries, charging collaborations

With Toyota and Daimler no longer holding Tesla shares, the electric vehicle company might be looking for a new partner – possibly a Bavarian one. In a new interview with Germany's Der Spiegel, CEO Elon Musk confirmed that he has had talks with BMW execs about future collaboration. "We are talking about whether we can collaborate in battery technology or charging stations," Musk said in the interview, according to Reuters. However, a Tesla spokesperson has tempered things by saying no formal agreements are in place at the moment. In the same interview, Musk reportedly praised BMW's use of carbon-fiber-reinforced plastic in its i sub-brand offerings, and said he would like to have a battery factory in Germany in the next five or six years. The possibility of technological cooperation between Tesla and BMW has been a hot topic this year. In June, Musk reportedly met with BMW execs, and the two companies were also rumored to have met with Nissan to discuss charging technology. When Daimler sold off its shares, there was talk of it opening the way for possible collaboration between the two automakers, as well.