Trunk comparison: BMW X2 vs Kia Stonic

Key Differences

The BMW X2 offers significantly more cargo length: with the seats folded down, the trunk is 11.4 in (+21%) longer and with the rear seat upright, 9.4 in (+35%) larger than the Kia Stonic.

In contrast, the Kia Stonic scores with more vertical space at the opening: the trunk opening is 5.1 in (+20%) higher and the distance from the loading edge to the trunk floor is 3.5 in (100%) greater than in the BMW.

The width of the opening is the same for both models; minor width differences at the narrowest point (≈2 in / 5%) are insignificant.

Implications for Usability

For long or flat items (skis, long boards, flat furniture parts), the BMW X2 clearly has the advantage: the significantly greater cargo length, especially with folded seats, allows longer loads without complicated diagonal positioning.

Those who regularly transport bulky, longer items or frequently fold down the rear seats will find more practical use in the X2.

The Kia Stonic is better suited for tall or bulky items: the higher opening creates more vertical clearance when loading large boxes or transporting items that require more height than length.

The greater distance between the loading edge and trunk floor also means more usable interior height directly behind the loading edge — this simplifies accommodating tall packages but may make sliding very flat items in somewhat more difficult compared to the X2.

Practical assessment: If your main need is for long, flat loads and maximum cargo space with folded seats, the BMW X2 is the better choice.

If you more often deal with bulky, tall luggage or large boxes and need more vertical opening, the Kia Stonic is more suitable. Opening width is not a distinguishing factor, and small differences in loading edge height are hardly relevant in practice.