Trunk comparison: Citroen C3 vs Volvo XC40

Key Differences
The Volvo XC40 has significantly more cargo length: with the seats folded down, the trunk is +12.6 in (24%) longer, and with the first row of seats upright, it is +9.4 in (36%) longer than the Citroën C3. The width of the trunk opening is +7.1 in (20%) larger on the Volvo, which makes loading wider items easier.
In contrast, the Citroën C3 has a much deeper trunk floor relative to the loading edge: the depth (loading edge to trunk floor) is +9.1 in (2200%) greater than that of the Volvo, creating a significantly more pronounced recess in the cargo area.
Impact on Usability
Due to the greater length and wider opening, the Volvo XC40 is better suited for long or bulky cargo (e.g., furniture parts, long packages, skis) and for convenient loading and unloading of large items: flat-lying, long parts fit more easily inside, and the wider opening reduces maneuvering when loading.
The longer cargo volume with folded seats makes the XC40 more flexible for larger transport tasks.
The deeper trunk floor of the Citroën C3, on the other hand, creates a pronounced recess: this offers more "hidden" volume and keeps cargo more stable below the loading edge, which is advantageous when goods need to be stored securely and as low as possible.
At the same time, this depth increases bending and reaching to the trunk floor during loading and unloading and can make lifting heavy items over the loading edge more difficult. For very long, flat items, the shorter interior of the C3 is disadvantageous.