Trunk comparison: BMW X4 vs Mazda Mazda CX-5

Key Differences

The Mazda CX-5 has a trunk opening that is 3.5 in higher (+13%) than the BMW X4, resulting in a significantly larger loading height to the roof edge. The BMW X4, on the other hand, has a trunk floor that is 1.2 in deeper (distance from loading edge to trunk floor), which is indicated here as +60% — this means the cargo space lies measurably lower below the loading edge.

All other specifications (length and width differences, loading edge height) are within a few percent and significantly smaller.

Impact on Usability

The higher trunk opening of the Mazda makes it easier to load tall or bulky items because there is more space above and less risk of collision with the tailgate. For frequent transport of tall boxes, plants, or bulky parts, the Mazda is therefore more practical.

The deeper trunk floor of the BMW offers more "recess depth" in the cargo area: luggage sits further below the loading edge, which can relieve the rearview mirror's field of vision when heavily loaded and allow for more cargo volume below the rear line.

At the same time, the greater depth means that heavy items must be lifted or lowered further when loading and unloading, making handling somewhat less comfortable.

The remaining differences are small: the BMW offers slightly more loading length with different seat positions, while the Mazda is marginally wider at the narrowest point and in the opening width.

The BMW's loading edge is slightly higher above the road, which additionally makes lifting heavy loads a bit more difficult.

Overall, the usage picture is as follows: Mazda scores with handling large/deep items due to the higher opening, BMW offers somewhat more recessed storage space due to the deeper trunk floor, but at the cost of somewhat more cumbersome loading and unloading.