Trunk comparison: Audi A3 Sportback vs Seat Ibiza

Key Differences

The Audi A3 Sportback offers a loading length that is 3.5 in longer (+13%) than the SEAT Ibiza with the first row of seats upright — 13% more length.

When folded down, it is still 3.1 in longer in favor of the Audi (+6%). The SEAT Ibiza has a loading floor that is 1.2 in deeper (loading edge → trunk floor) than the Audi, which corresponds to +19% depth.

The trunk opening of the Ibiza is 2 in higher (+6%), and the loading edge is overall 0.8 in higher above the ground (+3%). The width at the narrowest point is the same for both, while the width of the trunk opening is 3.5 in larger on the Audi (+10%).

Impact on Usability

The significantly greater length reserve in the Audi (+13% with the first row of seats upright) makes it more practical for longer items (skis, furniture boards, long boxes) without folding down seats.

The wider opening of the Audi (+3.5 in) also makes loading wider parts easier, even though this difference of 10% is just shy of being highlighted.

The higher trunk floor of the Ibiza (+19% depth) creates more usable depth/volume and is better suited for stackable or taller cargo — especially if the height of the opening (+6%) is sufficient to accommodate bulky, taller items.

A downside for the Ibiza is the slightly higher loading edge (+0.8 in), which makes lifting heavy items during loading slightly more difficult.

Practically, this means: For longer, flat, or wide cargo, the Audi is the better choice; for more volume in depth and better stacking options, the Ibiza is advantageous. Narrow internal restrictions do not matter since the narrowest width remains the same.