Trunk comparison: Audi A3 Sportback vs Renault Austral

Key Differences
The Renault Austral offers a longer cargo floor with the rear seat upright: +3.5 in or +12% compared to the Audi A3 Sportback. The width of the trunk opening of the Austral is +5.9 in (≈+15%) larger than the A3. The loading edge of the Austral sits +4.3 in (≈+16%) higher above the road.
The Audi A3 stands out with a greater trunk depth (loading edge to trunk floor): +3.1 in (≈+100%) compared to the Austral. The narrowest width in the cargo area is the same for both models; the difference in total length with folded seats (Renault +7%) is under 10% and is not highlighted here.
What impact do these differences have on usability?
Renault Austral — Advantages when loading bulky or wide items: The larger opening width (+15%) and the longer cargo floor with the rear seat upright (+12%) make it easier to store longer or wider items without folding the seats (e.g., furniture parts, long boxes, skis).
This makes the Austral more practical for users who frequently transport bulky, flat, or wide cargo.
Renault Austral — Disadvantage when lifting heavy loads: The loading edge about 4.3 in higher (+16%) means more lifting height when loading from street/ground level. Heavy or awkward goods are therefore physically more demanding to lift into the Austral than into the A3; aids or a ramp may be advisable.
Audi A3 Sportback — Advantage due to deeper cargo well: The significantly greater trunk depth (+100%) creates a deeper cargo well.
This has two effects: items sit lower and are more stable while driving (lower center of gravity, less shifting). This can be advantageous for loose or stackable cargo. Also, the effectively usable height under the loading edge is greater.
Audi A3 Sportback — Disadvantage in access and with long items: Despite the deeper cargo well, the wide openings and length with the rear seat upright are smaller in the A3 than in the Austral, so very long or very wide items are more likely to fit in the Austral.
The deeper cargo floor can also make loading and unloading smaller items somewhat more cumbersome (reaching deeper).
Conclusion: In short, the Renault Austral is better suited for regular transport of wide or long items (larger opening, longer floor with rear seat upright), but has disadvantages when lifting heavy loads due to the higher loading edge.
The Audi A3 offers advantages with its significantly deeper cargo well for secure storage and a lower center of gravity of the cargo, but is more limited in opening width and maximum usable length with the rear seat upright.