4.4i 2000-2001 had 282 bhp
4.4i 2002-2003 had 290 bhp
4.4i 2004-2006 had 315 bhp

The pre facelift x5 should will beat the facelift models off the line because they don't have valvetronic and the 6 speed tranny slowing them down. The facelift models get a lot better millage.