Trunk comparison: Audi A6 Sedan vs Audi Q2

Key Differences (Brief)
The Audi A6 offers significantly more cargo length: with the seats folded down, the trunk of the A6 is +19.7 in (34%) longer, and with the front seats upright, it is +14.6 in (47%) longer than the Audi Q2. In contrast, the Q2 has a considerably higher trunk opening: the opening height of the Q2 is +10.6 in (54%) above that of the A6. Additionally, the loading edge of the Q2 is +3.9 in (15%) higher above the ground than that of the A6. Smaller differences (trunk depths +0.4 in/9% and widths +1.2 in/3%) are below the 10% threshold, and the width of the opening is the same for both.
Impact on Usability
The significantly greater loading length of the A6 makes it much more suitable for long or flat items (e.g., skis, furniture boards, long boxes): more usable floor space means fewer restrictions when loading long cargo, especially when the rear seats are folded down or even with the rear seats upright.
For families with large luggage volume or users who regularly transport longer goods, the A6 is therefore more practical.
The Q2, on the other hand, scores in vertical clearance: the +10.6 in (54%) higher trunk opening makes loading tall items (with the same floor area) easier, as more vertical space is available at the opening.
However, the +3.9 in (15%) higher loading edge makes lifting heavy loads into the trunk more difficult compared to the A6 — frequent or heavy lifting is more strenuous in the Q2.
Since the opening width is the same and width/depth differences are minor, these dimensions hardly affect everyday usability.
Conclusion: Those transporting longer or larger floor cargo are better served by the A6; those who more often load tall items benefit from the higher opening of the Q2 but must consider the higher lifting to the loading edge.