Trunk comparison: Audi Q3 vs Citroen C3

Key Differences (>10%)

The Audi Q3 offers a 11.8 in (22%) longer cargo length with the seats folded down and a 9.1 in (34%) longer cargo length with the first row of seats upright compared to the Citroën C3. Additionally, the width of the trunk opening in the Audi Q3 is 9.4 in (27%) larger.

In contrast, the Citroën C3 has a significantly greater depth of the cargo area (loading edge to trunk floor): this is 5.5 in (156%) larger than in the Audi Q3.

What this means for usability

The longer cargo length of the Audi Q3 makes it clearly more practical for long items such as furniture or building materials, skis, or long boxes.

Combined with the 9.4 in wider opening, wide or bulky items can be loaded more easily and gently. For users who regularly need to transport longer or wider cargo, the Q3 is the better choice.

The Citroën C3 scores with the significantly greater depth of the trunk: this creates more usable volume below the loading edge, is suitable for stackable or bulky but not necessarily long items, and offers better concealed storage space.

Due to the higher loading edge (+1.2 in) and the greater depth drop, loading heavy, bulky items is somewhat less practical—they must be lifted higher or over a deeper edge.

Smaller differences such as the 1% higher opening height of the C3, the 4% larger narrowest width in the Q3, or the 4% higher loading edge of the C3 are less relevant for everyday usability.

In summary: Audi Q3 = clear advantage in length and width of the opening (better for long/bulky cargo). Citroën C3 = advantage in usable volume in depth (better for stackable/concealed cargo), but with a somewhat less favorable loading height.