Trunk comparison: Hyundai Elantra GT Wagon vs Seat Ibiza

Key Differences (highlighted: >10%)
The Hyundai i30 Wagon offers a +14.6 in (26%) longer cargo area when the seats are folded down compared to the Seat Ibiza. With the front seats upright, the i30 Wagon is even +14.6 in (54%) longer. The trunk opening of the Seat Ibiza is +5.9 in (22%) higher than that of the i30 Wagon.
The trunk depth (loading edge to trunk floor) is +7.5 in (1800%) greater in the Seat Ibiza. The loading edge of the Seat Ibiza is +2.8 in (11%) higher above the ground, while the width of the trunk opening in the Hyundai i30 Wagon is +3.9 in (11%) larger.
The narrowest width inside the trunk differs only slightly (i30 +1.2 in / 3%), so it is not highlighted here.
Implications for Usability
More loading length in the i30 Wagon (26%/54%) makes it significantly more practical for longer items such as slats, furniture boards, skis, or long boxes. If you frequently transport long or elongated cargo, the i30 offers noticeably more flexibility.
The higher trunk opening (+22%) and significantly greater depth (+7.5 in) in the Ibiza favor loading tall or bulky items—boxes, flower pots, or taller equipment are easier to accommodate because the opening provides more vertical space.
However, the loading edge in the Ibiza is higher (+2.8 in), which makes lifting heavy loads more strenuous.
The wider trunk opening of the i30 (+3.9 in) facilitates loading wider items and maneuvering when loading and unloading; combined with the lower loading edge, the i30 is overall more practical for heavy or bulky, wider cargo.
Conclusion: For long and wide loads, the Hyundai i30 Wagon is the better choice. For very tall or bulky cargo, the Seat Ibiza offers advantages due to the larger opening height and trunk depth but pays for this with a higher loading edge that makes lifting more difficult.