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While BMW spent last year adding upgraded engines to its lineup, the X5 sat untouched, forced to enjoy only the 3.0-liter diesel found in the xDrive35d. A potent mill, yes, but the other Bimmers received a more efficient, single turbo inline-six; if they didn't, more power came to their twin-turbo setup. A 400-hp twin-turbo V-8 headlined the X6, while the M versions of it and the X5 boasted a silly 555 hp. Now, the standard X5 gets its turn: Along with an exterior refresh, the 2011 BMW X5 receives two new powertrains.inline_mediumwraptextright26792627/features/news/1002_2011_bmw_x52011-BMW-x5-front-promo.jpgTrue