Trunk comparison: Audi A6 Avant vs VW T-Roc

Key Differences
The Audi A6 Avant offers significantly more cargo length: with the seats folded down, the trunk of the A6 is 18.9 in (32%) longer, and with the first row of seats upright, it is 15.4 in (50%) longer than the VW T-Roc.
The VW T-Roc, on the other hand, has a higher trunk opening (+5.1 in / 18%) as well as a significantly greater depth from the loading edge to the trunk floor (+7.9 in / 1000%) and a higher loading edge to the road (+5.1 in / 20%). Width differences are small at 1% and 9%, and thus negligible.
Impact on Usability
The longer loading areas of the A6 Avant make it clearly better suited for long or flat goods: furniture boards, skis, long boxes, or bulky items can be loaded and transported flatter and more easily. If regular transport of long loads is important, the A6 is the more practical vehicle.
The T-Roc scores in vertical usability: the higher opening makes it easier to load tall items (e.g., plants, tall boxes) in the upright position. The greater depth of the trunk also means that smaller items can lie deeper and more securely without shifting.
However, the higher loading edge of the T-Roc makes lifting heavy or bulky loads more laborious – here the A6 has a practical advantage with its lower loading edge when loading and unloading.
In summary: A6 Avant = better for long, flat, and heavy/easy-to-lift loads; T-Roc = more practical solution for taller and deeper-stowed luggage, but with increased lifting effort at the loading edge.