Trunk comparison: Hyundai IONIQ vs Kia Stonic

Key Differences

The Hyundai IONIQ offers significantly more usable loading length: with the seats folded down, the trunk is 10.2 in (19%) longer and with the front seats upright, the trunk is 8.7 in (32%) longer than the Kia Stonic.

In contrast, the Kia Stonic has a higher opening and more interior height: the height of the trunk opening is 5.1 in (20%) greater and the depth of the trunk (loading edge to trunk floor) is 2.4 in (50%) greater than the IONIQ.

Smaller differences (width at the narrowest point, opening width +2 in; loading edge height +1.2 in/4%) exist but are under 10% and thus less significant.

Impact on Usability

Because the IONIQ offers significantly longer loading options, it is better suited for long items like skis, ladders, furniture parts, or longer packages – both with folded seats and in everyday use with the seats upright. For users who often need to transport long, flat cargo, the IONIQ clearly has the advantage.

The Stonic scores in height: the larger opening and deeper loading floor make loading bulky or tall items (large suitcases, boxes, upright cartons) easier, as more interior height is available.

However, the loading edge is only slightly higher, making lifting a bit more demanding but not a major difference. Due to the slightly greater width, the Stonic can also better accommodate wide but not excessively long goods.

Conclusion: IONIQ = advantage in length and transporting long items. Stonic = advantage with vertical and bulky cargo as well as somewhat easier handling of tall items due to larger opening and deeper loading floor.