Trunk comparison: BMW iX1 vs BMW X3

Summary of the Main Differences

The BMW X3 offers a longer trunk: with the seats folded down, it is +6.3 in (≈10%) longer than the iX1, and with the rear seats upright, it is +2 in (≈6%) longer.

The trunk opening of the X3 is higher (+2.8 in, ≈10%) and at its narrowest point wider (+3.9 in, ≈10%); the opening width is also slightly larger (+1.2 in, ≈3%).

The most significant difference in favor of the iX1 is the greater depth between the loading edge and the trunk floor: +0.8 in, which is indicated here as +100%. The loading edge of the iX1 is also slightly higher above the road (+0.8 in, ≈3%).

Impact on Usability

Practically, this means: The X3 is better suited for long and wide items. The longer dimensions with folded seats and the greater width at the narrowest point make it easier to store furniture parts, long suitcases, or sports equipment; the higher trunk opening makes it easier to load tall items.

The iX1 offers more usable interior height in the cargo area profile due to the greater depth between the loading edge and the trunk floor (deeper "cargo well").

This can help to sink bulky but not very wide cargo deeper or to store irregular stacks more stably. However, the slightly higher loading edge makes lifting heavy loads somewhat more difficult than in the X3.

For everyday use: For frequent transport of large, long, or wide items, the X3 is the more practical choice. Those who often want to accommodate bulky but compact cargo deep in the trunk and do not need to lift heavy loads will find an advantage in the iX1 due to the deeper cargo area.