Trunk comparison: BMW X2 vs BMW X4

Key Differences

The BMW X4 offers a slightly longer cargo space: with the seats folded down, the trunk of the X4 is +2.4 in (≈4%) longer, and with the first row upright, it is +3.5 in (≈10%) longer. The trunk opening of the X4 is higher (+1.6 in / ≈6%) and the opening width is also slightly larger (+1.6 in / ≈4%).

The most notable difference lies in the trunk depth: the BMW X2 is +0.4 in (≈13%) deeper here than the X4. The loading edge of the X2 is slightly higher (+0.4 in / ≈1%). At the narrowest point, both models are equally wide.

Impact on Usability

The longer trunk length of the X4 makes it more practical for longer items, especially when the rear seats are folded down or in the normal seating configuration (close to +10%). A higher trunk opening and slightly larger opening width make loading bulky or tall items easier.

The deeper trunk of the X2 (≈13% more depth) means more usable volume behind the loading edge for higher stacks and bulky luggage; this has a positive effect with many medium-sized suitcases or boxes.

The slightly higher loading edge of the X2 makes lifting when loading minimally more strenuous but is hardly noticeable in practice.

Since the narrowest width of both models is the same, there is no difference for very tight items loaded crosswise. Overall: the X4 is advantageous for longer and taller cargo and easier loading due to the larger opening; the X2 offers somewhat more usable volume due to greater depth with comparable exterior width.