With a new 5-series upon us, BMW has not only seen fit to add an acre-foot to the stalwart executive sports machine’s sea of alphanumerics but also tooffer up another addition to the company’s not-quite-M portfolio. Until the next M5 arrives, the M550i xDrive*stands as the 5’s range-topping machine. Boasting a twin-turbo 4.4-liter V-8 making […]
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Add M to X: BMW Announces 2018 M550i xDrive, the Ultimate 5-series—for Now
