Trunk comparison: BMW X5 vs Ford S-MAX
Key Differences
Both models mainly differ in the shape and accessibility of the trunk.
The Ford S-Max offers only a slightly longer loading length (+4.7 in / 6%) with the rear seats folded down and also a small additional length (+3.1 in / 8%) with the first row of seats upright compared to the BMW X5. The differences are much more significant in the trunk opening and entry situation: The height of the Ford S-Max trunk opening is 5.1 in (16%) higher than that of the BMW X5. The depth of the trunk (distance from loading edge to trunk floor) is 0.8 in (200%) greater in the Ford S-Max — with a very small absolute difference, the ratio results in a high percentage value.
Additionally, the loading edge of the BMW X5 is 8.7 in (39%) higher above the ground than that of the S-Max. The narrowest trunk width in the BMW X5 is 2.8 in (7%) wider than that of the S-Max; the opening width is 1.2 in (3%) larger in the X5.
Impact on Usability
The higher trunk opening of the S-Max makes loading tall items (e.g., large boxes, furniture pieces, or bulky sports equipment) easier because more vertical clearance remains when driving in. Combined with the slightly greater trunk depth, this practically means more space for tall or upright cargo.
However, note that the stated depth is only 0.8 in larger — the percentage value is high due to a very small reference height, so the absolute advantage is small but can be noticeable when loading very flat items.
The significantly higher loading edge in the BMW X5 makes lifting heavy items more strenuous: heavy boxes or furniture must be lifted higher.
On the other hand, the X5 leads slightly in usable width (at the narrowest point and at the opening), which helps when transporting wider items — these width advantages are moderate (<10%) and only noticeably affect very tight cases.
In summary: For frequent loading of tall or bulky items and for easier loading and unloading (lower loading edge and higher opening), the Ford S-Max is more advantageous in everyday use.
Those who need to transport wider items and accept having to lift higher benefit slightly from the greater interior width of the BMW X5. Length differences in the loading floor (6–8%) are minor and have less impact on everyday use.