Trunk comparison: Audi Q3 vs Opel Astra Wagon

Key Differences (Brief Summary)
When all seats are folded down, both models offer the same trunk length. However, with the rear seats upright, the Opel Astra Wagon is 6.7 in (19%) longer than the Audi Q3. The height of the trunk opening is the same for both.
The Audi Q3 has a significantly greater interior depth (distance from loading edge to trunk floor): +2.8 in (350%) compared to the Astra.
Likewise, the loading edge of the Audi Q3 is 6.3 in (27%) higher above the road than the Opel. The narrowest trunk width is slightly larger on the Astra by +3.5 in (9%), while the Audi's opening width is minimally advantageous by +2.8 in (7%) — both values are under 10% and thus less decisive.
What Impact Do These Differences Have on Usability?
Opel Astra Wagon: The longer loading area with rear seats upright makes the Astra more practical for long items (e.g., slats, skis, furniture) without needing to fold the seats down. The lower loading edge height makes loading and unloading heavy or bulky items easier, as less lifting is required.
Audi Q3: The significantly greater distance between the loading edge and trunk floor (greater "depth") creates more vertical space inside and can be advantageous when stacking or transporting taller cargo.
At the same time, the higher loading edge makes loading heavy objects less practical — items must be lifted higher or more frequently over an edge.
Both vehicles differ little in opening height and only slightly in width and opening size; these factors are hardly noticeable for most everyday cargo.
Conclusion: For long items and easier lifting, the Opel Astra Wagon is more practical; for more interior depth and increased stackability inside the trunk, the Audi Q3 offers advantages but pays for this with a significantly higher loading edge.