View Here : Compare Bmw X3 And X5
The X3 is your standard compact SUV think Audi Q5, X5 is between a mid range and a fullsize, think Q7. As for deciding between the evens and odds, the evens X4, X6 will offer you SUV capability and size but with the cargo capacity of a small sedan.
Truth: X3 vs old X5 X3 F25 (2011 - 2017) When I shopped the two back in '06 (I got the X3 because of a great deal) I found the size virtually the same but the X5 had a much more luxurious interior and plusher seats/door panels etc. thus making less room inside than the rather spartan X3.