Trunk comparison: BMW iX1 vs Kia Stonic

Key Differences

The BMW iX1 offers significantly more usable loading length: with the seats folded down, the trunk is 9.8 in (18%) longer and with the front seats upright, the trunk is 8.3 in (30%) longer than in the Kia Stonic.

Conversely, the Kia Stonic has a significantly greater trunk depth (loading edge to trunk floor): it is 6.3 in (800%) deeper, which creates more vertical space below the loading surface.

Smaller differences include the trunk opening height being 2.8 in (10%) larger in the Kia and the trunk opening width being 3.9 in (10%) larger in the BMW; the Kia's loading edge is 2 in (7%) higher above the ground and the narrowest width inside the trunk is 2 in (5%) larger in the Kia.

Impact on Usability

The longer loading areas of the BMW iX1 make it more practical for long items such as furniture parts, skis, or wheeled objects that need to be loaded lengthwise. The wider opening of the BMW (3.9 in) additionally supports loading wider items, although this difference is 10% and was therefore not emphasized.

The Kia Stonic, on the other hand, is better suited for tall or bulky cargo below or above the loading surface: the significantly greater trunk depth (by 6.3 in or 800%) and the slightly higher opening height allow for better stacking and accommodation of tall items.

However, the 2 in higher loading edge makes loading heavy items more difficult compared to the BMW.

In summary: BMW iX1 = advantage in length and slightly wider opening → better for long/flat loaded cargo. Kia Stonic = advantage in depth and opening height → better for tall, bulky, or stacked cargo, but with a higher loading edge.