Trunk comparison: Audi A3 Sportback vs Jeep Compass

Key Differences (highlighted: >10%)
Jeep Compass has a longer cargo floor with the seats folded down: +6.3 in (11%). This means noticeably more usable length for long items like slats, skis, or carpet rolls.
The loading edge of the Jeep Compass is +3.9 in (15%) higher above the road. This significantly increases the lifting height when loading and unloading heavy items.
Other Differences (≤10%)
The height of the trunk opening of the Jeep Compass is +3.1 in (10%) higher — this makes it easier to load tall items, but since it is exactly 10%, it was not highlighted as a main difference.
With normal loading depth (loading edge to trunk floor), both models are equal. The narrowest width in the trunk is 0.8 in (2%) larger in the Audi A3 Sportback, while the width of the trunk opening is 2.4 in (6%) larger in the Jeep.
Impact on Usability
Because the Jeep Compass is significantly longer with the seats folded down, it is better suited for long and flat cargo: hardware store materials, skis, long boxes, or furniture parts are easier to accommodate. The higher trunk opening additionally supports loading tall items.
The +3.9 in higher loading edge of the Compass makes lifting and heaving heavy cargo more strenuous — especially for frequent transport of heavy loads, for older users, or without aids, this is a disadvantage. The Audi A3 Sportback with its lower loading edge is more ergonomic and easier to load in such cases.
The slightly larger minimum interior width of the A3 and the same floor depth mean that wider, bulky items fit a bit more comfortably at the narrowest point in the Audi. On the other hand, the larger opening width of the Compass helps when angling large items through the tailgate.
Conclusion
Jeep Compass: better for long and tall cargo (more usable length with seats folded down), but with a higher loading edge that makes lifting harder. Audi A3 Sportback: more advantageous for frequent transport of heavy or bulky items thanks to a lower loading edge and slightly larger minimum interior width.