Trunk comparison: Kia Stonic vs VW ID.3

In a direct comparison, three significant differences stand out: The VW ID.3 is noticeably longer in usable cargo length, while the Kia Stonic has an advantage in the interior depth of the trunk.

Specifically: The ID.3 offers +6.3 in (12%) more cargo length with seats folded down and +3.9 in (14%) more cargo length with the first row of seats upright than the Stonic.

Conversely, the Kia Stonic has a greater depth between the loading edge and trunk floor (+0.8 in / 13%). Other differences (trunk opening height +1.6 in / 5%, narrowest width +1.6 in / 4%, opening width +1.2 in / 3%) are significantly smaller; the loading edge height is the same on both models.

Impact on Usability

The longer cargo length of the ID.3 (both +12% and +14%) makes it better suited for longer items and flat transports: fully folded down, long furniture parts, slats, or longer sports equipment are easier to load; even with seats upright, longer boxes or luggage are more likely to fit in the ID.3. This is especially relevant when regularly transporting long cargo.

The higher interior space between the loading edge and trunk floor in the Stonic (+13%) creates more "depth space" below the loading edge.

Practically, this means bulky, taller items can be recessed deeper and thus often more space-efficiently; additionally, stacking is easier without immediately blocking the tailgate. Combined with the slightly larger opening height of the Stonic (even if only +5%), this facilitates storing tall or bulky cargo.

The identical loading edge height means the same physical effort when lifting for both models. Small width differences favoring the Stonic are hardly relevant in practice but have a positive effect when very wide items need to be maneuvered through the opening.

Conclusion: Those who frequently transport long, flat cargo will find the ID.3 the more practical solution; those who benefit more from the "depth" of the trunk and better storage of tall items are better off with the Kia Stonic.