Trunk comparison: BMW X4 vs Ford S-MAX

Key Differences

The Ford S‑Max offers a longer cargo area with the seats folded down than the BMW X4: the usable loading length is +10.2 in (15%) greater.

The trunk opening of the S‑Max is significantly higher: +9.1 in (33%) compared to the X4. On the other hand, the BMW X4 has a greater depth between the loading edge and the trunk floor by +2 in (167%) as well as a significantly higher loading edge above the road by +8.7 in (39%).

Smaller differences in trunk length with the first row of seats upright (+10%, not highlighted) and widths (each +3%, ~3%) exist but are less relevant.

Impact on Everyday Usability

Due to the longer cargo area with folded seats and the higher opening, the Ford S‑Max is clearly better suited for long or bulky items (furniture, construction or sports equipment) and for loading larger boxes or bulky packages.

The higher opening makes it easier to insert tall objects and reduces conflicts with roof height.

The BMW X4 requires more lifting effort when loading or unloading heavy items because of the +8.7 in higher loading edge.

Additionally, the +2 in greater depth between the loading edge and trunk floor means items must be lowered further, making handling during loading more demanding (especially with a low back or heavy loads).

The smaller width differences and the 10% longer cargo area with the first row upright in the S‑Max have only marginal effects. Overall, the S‑Max is the more practical choice for frequent loading and unloading, transporting long or tall items, and family-oriented use.

The X4, with its raised loading edge and greater interior floor depth, has different accessibility that is disadvantageous for frequent transport of heavy loads.