Trunk comparison: Audi A3 Sportback vs BMW X2

Key Differences and Impact on Usability
In terms of cargo space length, the BMW X2 is longer: with the seats folded down, it is 6.7 in (11%) longer and with the first row of seats upright, it is 6.3 in (21%) longer than the Audi A3 Sportback.
This makes the X2 more practical for long items (e.g., skis, boards, long furniture parts) — even though the 11% extra length with folded seats is rather moderate, the X2 remains the better choice for elongated cargo.
On the other hand, the Audi A3 Sportback scores in the vertical usability of the trunk: the trunk opening is 4.3 in (17%) higher and the depth from the loading edge level to the trunk floor is 2.8 in (78%) greater than in the BMW.
This means items lie deeper in the A3 and the opening is higher — together these factors make it easier to store tall or bulky items and create a trunk space that feels larger and is practically more usable.
Additionally, the loading edge of the BMW X2 is 5.1 in (19%) higher above the ground, which makes lifting heavy loads into the X2 noticeably more strenuous; the A3 is more ergonomic in this regard.
The width differences (narrowest point +0.4 in, opening width +0.8 in in favor of the X2) are minimal and have practically no impact on usability.
Conclusion: For long, flat cargo, the BMW X2 is advantageous due to the longer loading area. For storing tall, bulky, or heavier items as well as for easier loading and unloading, the Audi A3 Sportback is better suited thanks to the higher opening, greater floor depth, and lower loading edge.