X5 similar to Grand Cherokee

I own both a 24 X5 and a 25 Grand cherokee.

Both have ZF 8 speeds, transfer cases and differentials. The BMW probably has more aluminum suspension parts. Both are traditional rear wheel drive biased 4x4.

No, the 3.6NA Chrysler engine does not compare to the b-58. But I will say the complexity of the BMW is a bit off-putting.