-BMW’s M Performance lineup is growing, most recently with the addition of the X4 M40i, which targets the Audi SQ5 and the upcoming Mercedes-Benz GLC450 AMG. Unlike those two, however, the BMW is based on a “crossover coupe”—and based on its specs and appearance, it might well be the sportiest SUV in its size class.
Being an M Performance model, the X4 M40i has been tweaked by the company’s M GmbH performance gurus. It’s powered by an upgraded version of the X4 35i’s N55 inline six, rated here at 355 horsepower and 343 lb-ft of torque. That’s an increase of 55 horsepower and 43 lb-ft, and it translates into a factory-estimated zero-to-60-mph sprint of just 4.7 seconds, down from 5.2 seconds for the 35i. Top speed is governed at 130 mph, but it can be increased to 150 mph.
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The X4 M40i rolls on 245/45 front and 275/40 rear rubber on 19-inch wheels; it can also be specified with 245/40 and 275/35 tires on 20-inch wheels. The suspension has increased front camber as well as stiffer springs and antiroll bars. The steering is modified, as well. All-wheel drive is standard.
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We were impressed by the performance of the regular X4 35i. And there’s a good possibility the 40i will serve as a segment benchmark when it appears in early 2016.
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