there is alot of speculation about the x5 getting the twin turbo engine but my question is if bmw tought about putting this engine in the x5,why didnt they just put it from its launched? because from what i remember the x5 was launched in november and the 335i coupe with the twin turbo was ready for sale in september so that means that the twin turbo engine was ready right? so why didnt they just put it in the x5 from the beggining?