Frankfurt preview: 2014 BMW X5 M50d

The Europe-only M50d packs BMW\'s most powerful oil-burning straight-six.

BMW has lifted the veil off of the 2014 X5 M50d ahead of its scheduled debut at the Frankfurt Motor Show next month. The M50d is the most powerful - and most expensive - diesel-burning X5 available.

The X5 M50d boasts a 3.0-liter six-cylinder engine that uses three turbochargers to churn out 381 horsepower and 546 lb-ft. of torque, figures that earn it the distinction of being the most powerful oil-burning straight-six on sale in Europe. Power is sent to all four wheels via an eight-speed automatic transmission and BMW's xDrive all-wheel drive system.

The sprint from zero to 62 mph takes 5.3 seconds and top speed is electronically limited to 155 mph. The SUV returns up to 35.1 mpg in a mixed European cycle.

To keep the cavalry in check, the X5 M50d comes standard with the Adaptive M suspension package that consists of BMW's dynamic damper control, an air-suspended rear axle and electric power steering.

The M50d stands out from the regular X5 thanks to a bespoke front bumper with large air dams, body-colored fender flares, two oversized exhaust tips and model-specific 19-inch alloy wheels wrapped in low-profile tires. 20-inch alloys are available as an option.

Inside, the M50d gains piano black trim, a leather-wrapped M steering wheel and Alcantara inserts in the seats.

The X5 M50d will go on sale throughout Europe later this year but BMW does not plan on offering it in the United States.

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