Making its world debut in Geneva, the new 2015 BMW Alpina B6 xDrive Gran Coupe cranks up the visual and visceral intensity of an already attractive vehicle with a series of factory-blessed enhancements served up by one of the world's best-known BMW tuners. This dynamic duo used the formal unveiling to confirm the striking made-to-order B6 xDrive Gran Coupe also will be available here in the U.S. The stylish 4-door -- which will sticker at $118,225 -- goes on sale next month following its appearance at the New York Auto Show. Like other collaborative efforts, the new B6 xDrive Gran Coupe will start life at BMW and then be shipped to Alpina for the final upgrades, which generally add about two weeks to the buildup process. 

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The most obvious elements in the B6 Alpina remake are subtle but aerodynamically effective front and rear spoilers that help keep the car more securely planted as it heads to its 198-mph top speed. Also doing their part are custom 20-inch staggered-width light alloy wheels wrapped in sticky Michelin Pilot Super Sport tires - 255/35 fronts and 285/30 rears. Less visible are NACA ducts that channel cooling air to the engine, brakes and intercoolers. In addition to the Gran Coupe's long list of standards, the Alpina cabin revamp brings signature blue accenting on the instrument faces and other unique trim bits. And like all Alpina offerings, customers can opt for any number of additional personalization touches.

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Centerpiece of the new B6 Gran Coupe is a modified version of the BMW 4.4-liter twin-turbo V8. In addition to more robust Mahle pistons, the engine is fitted with larger turbochargers, upgraded intercoolers and supplemental oil and water coolers. Downstream, a free-flowing Alpina stainless steel exhaust system also adds aural excitement and can be upgraded with an even lighter-weight titanium alternative. Collectively, the changes push output of the Alpina Bi-Turbo V8 to 540 horsepower and 540 lb-ft of torque compared to the base 650i engine's 445/480 stats and the M6's 560/502 figures.  Backed by a tweaked ZF 8-speed Sport Automatic Transmission with Alpina Switchtronic programming and BMW's intelligent xDrive all-wheel drive system, the engine can send the new B6 from 0-60 mph in just 3.7 seconds. 

Final ingredient in the B6 xDrive Gran Coupe formula is a comprehensive retuning of its Electronic Damping Control and Active Roll Stabilization suspension systems. That reworking nets stiffer Alpina-spec springs and shocks along with revised front camber settings in addition to the aforementioned wheel/tire upgrade. 

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Like the BMW Alpina B7 xDrive - the only other Alpina model currently brought into the U.S. - the new 2015 BMW Alpina B6 xDrive Gran Coupe will carry a full BMW factory warranty. It will be available in a full range of colors, including exclusive Alpina Blue and Alpina Green and buyers will be able to take delivery at the BMW Welt center in Munich or the BMW Performance Center in Spartanburg, South Carolina if they so choose. 

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