X5 4.8i In 1999, we introduced a whole new vehicle category to the world: the Sport Activity Vehicle. Now, seven years later, we’ve expanded on a great idea. The all-new 2007 BMW X5 4.8i boasts an impressive 350 horses and maximum torque of 350 lb-ft — an increase of 35 hp and 26 lb-ft, respectively. And yet, thanks to equally powerful technology, the engine is also fuel-efficient.