Question: what is the difference in the bmw x5 series?
Answer: The BMW X5 comes in two different trim levels. ... One of the main differences between these trim levels is in the engine they come equipped with. The xDrive40i has a 3.0-liter I-6 with dual turbochargers. The xDrive40i keeps the twin turbochargers but replaces the engine with a 4.4-liter V-8.