Trunk comparison: Kia Stonic vs Seat Tarraco

Summary of the main differences

The SEAT Tarraco offers a cargo space that is 19.7 in (36%) longer with the seats folded down and 16.9 in (62%) longer with the first row upright compared to the Kia Stonic. The width of the trunk opening is 6.3 in (16%) larger on the Tarraco.

In contrast, the Kia Stonic has a significantly greater trunk depth measurement (loading edge to trunk floor): it is 4.7 in (200%) deeper than the Tarraco here.

Differences under ~10% (trunk opening height +1.6 in / 5%, loading edge height above road +0.8 in / 3%, narrowest width +1.6 in / 4%) exist but are rather minor.

What are the practical implications of these differences?

The larger length dimensions of the Tarraco (36% and 62% more) make it clearly better suited for long or bulky loads: slats, long furniture parts, skis, or moving boxes can be more easily and further pushed into the cargo space, especially when the seats are folded down.

The 6.3 in wider trunk opening significantly supports loading large or wide items and reduces maneuvering when loading.

The greater "depth" value of the Stonic means that the cargo floor sits deeper relative to the loading edge.

Practically, this means that items can be recessed further down or stacked more securely in the Stonic, so the visible height behind the loading edge is lower – advantageous for flatter, wider, or higher stacked cargo. The loading edge on the Stonic is only slightly higher (+0.8 in), which hardly complicates handling.

The smaller differences (opening height +1.6 in on the Tarraco, narrowest width +1.6 in on the Stonic) only marginally affect usability: the Tarraco offers slightly more vertical clearance when loading, the Stonic slightly more room in width at the narrowest point.

Conclusion: For regularly carrying long or wide loads, the SEAT Tarraco is the more practical choice. For better "recessing" and secure stacking of lower cargo behind the loading edge, the Kia Stonic can offer advantages.