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2013 BMW 6 Series Gran Coupe Wallpapers, Information, Videos
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12-18-2011, 11:05 PM
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soapsuds
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Drives: 2007 335i
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So what's the deal with the "6 cylinder TwinPower turbo engine" in the 640. Is that the same as the N55 in the 335, or is this a different engine? What gives it the extra 0.5 liter of badge pseudo-displacement?
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