Trunk comparison: BMW X5 vs Citroen C3

Biggest Differences (Highlighted)

The BMW X5 offers significantly more cargo space: with the seats folded down, its trunk is +19.7 in (37%) longer, and with the first row of seats upright, it is even +14.6 in (55%) longer than the Citroën C3. In width, the X5 is +5.5 in (15%) larger at its narrowest point, and the trunk opening width of the X5 is +8.3 in (24%) wider than that of the C3. Contrary to this larger base area, however, the C3 has a significantly deeper loading area: the depth (loading edge to trunk floor) is +8.7 in (2200%) greater in the Citroën than in the BMW X5.

What are the implications of these differences for usability?

Due to the considerably greater length and width, the BMW X5 clearly has the advantage when it comes to transporting bulky or wide items (furniture, larger boxes, bicycles with or without folded seats).

The larger opening width makes loading and unloading larger parts easier and more flexible. This applies both to planned transports and occasional loading with awkward items.

The deeper trunk of the Citroën C3 means there can be more vertical space (e.g., for tall or stacked items), but at the same time, there is a greater height difference between the loading edge and the trunk floor.

This increases the effort required to lift heavy loads inside and can make handling bulky but low-lying items more difficult. Combined with the smaller length and width, the C3 is therefore better suited for narrow, tall, or hidden cargo, but less so for wide or very long transports.

The smaller differences in trunk opening height and loading edge height (+0.4 in in favor of the X5) are practically negligible and hardly affect usability.

Conclusion

For users who frequently transport wide, long, or bulky cargo, the BMW X5 is the better choice due to its greater length, width, and opening size.

The Citroën C3 can offer advantages with its deeper loading area for specific, rather narrow or tall items but is overall less suitable for bulky transports. The decision therefore depends on the typical cargo: bulky and wide → BMW X5; narrow/tall and occasional concealment of luggage → Citroën C3.