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Check out the trick way you access the tire valve on this BMW Alpina B6

The wheels are one of the first things you notice when checking out the 2015 BMW Alpina B6 xDrive Gran Coupe. The 20-inch aluminum alloy rollers have 21 spokes that spray out from their hubs, creating one of Alpina's signature design features. But there's also plenty of function to go along with the stylistic form of this hotted-up BMW 6 Series Gran Coupe.
By rotating the Alpina roundel and unlocking the center hub, you gain access to the tire valve and bolts, which are hidden inside. They're literally kept under lock and key, and they protect your Alpina's wheels from the elements and theft. This unique center-fill system employing a hollow spoke isn't a new setup for the favored BMW tuner, but since Autoblog had one in our offices this week, we thought we'd take the opportunity to show the unique mechanism in case you haven't seen it before. Check it out in our brief video below.

BMW eyes Z4 replacement before 2020

As BMW has been busy building four-door versions of two-door versions of four-door cars, less useful crossovers and front-drive minivans, you could be forgiven for thinking it had given up on its aging Z4 roadster. But that, we're pleased to report, isn't the case. According to Automotive News, BMW is hoping to release the next-generation Z4 (if that's what it ends up being called) before the close of this decade. The news outlet spoke to the company's chief engineer, Klaus Frohlich, at the 2015 Geneva Motor Show, who indicated that BMW may split costs on the new car with Toyota, as part of the partnership between the two automakers. This partnership is integral to the next-gen Z4, largely because of the declining importance of the roadster segment, Herr Frohlich indicated. "If you look at the volume... we have to realize that these segments are shrinking," Frohlich told AN. According to the publication, sales of the Z4, which hit the market in its current form back in 2009, dropped 11 percent in Europe and 13 percent in North America. The car also is less attractive to customers in China for a number of reasons. "[Chinese customers] are not interested in roadsters," Frohlich explained. That's because privacy is a high priority for drivers in China, AN said. On top of that, open-roof cars expose their customers to China's notorious air pollution, which drivers are understandably keen to avoid. Related Video:

Ward's reveals annual 10 Best Engines list for 2013

Ward's Auto has released its annual 10 Best Engines award winners. The 2013 list covers the full width and breadth of the internal combustion spectrum, from a spate of efficient four-cylinders to the most powerful production V8 on the planet. As always, the entries must be available in a production vehicle in the first quarter of 2013 with an MSRP of less than $55,000. The supercharged 3.0-liter V6 from the Audi S5 held on for the fourth consecutive year, and BMW earned two spots on the list with its turbo 2.0-liter four-cylinder and turbo 3.0-liter inline-six.
Ford pulled in two awards for its 2.0-liter EcoBoost four-cylinder and and the supercharged 5.8-liter V8 from the Shelby GT500. Honda matched BMW and Ford with two wins of its own. Wards awarded the 2.4-liter four-cylinder from the Honda Accord Sport as well as the 3.5-liter V6 from the Honda Accord. Chrysler, General Motors and Subaru each garnered a spot on the list as well for the 3.6-liter V6 in the Ram 1500, the turbo 2.0-liter four-cylinder in the Cadillac ATS and the 2.0-liter four-cylinder the Subaru BRZ, respectively. You can read the full press release below for more information.