Trunk comparison: Audi A6 Avant vs Dacia Duster

Key Differences
The Audi A6 Avant offers significantly more loading length: With the seats folded down, the trunk of the A6 is 12.6 in (20%) longer, and with the first row of seats upright, it is 7.9 in (21%) longer than the Dacia Duster.
The Duster has other advantages: The trunk opening is 3.1 in (11%) higher, the depth (distance from loading edge to trunk floor) is 2.4 in (300%) greater, and the loading edge sits 4.7 in (19%) higher above the road than the Audi.
The narrowest width of the trunk is the same for both models, and the width of the opening is only slightly (+2.4 in / 6%) larger on the Audi.
Impact on Usability
The longer cargo area in the Audi A6 Avant makes it significantly more suitable for long items and transport with folded rear seats: furniture parts, long packages, skis, or a continuous row of luggage can be accommodated more easily.
Even with the seats in the normal position, the A6 offers more usable depth, increasing flexibility when loading suitcases or longer pieces of luggage.
The Dacia Duster scores in vertical usability: The greater opening height makes loading taller or bulkier items easier, and the larger distance between the loading edge and trunk floor provides more interior height or a larger volume near the loading edge.
However, this also has a downside: The 4.7 in higher loading edge makes lifting heavy items into the vehicle more strenuous and complicates loading and unloading for people without aids. The greater "depth" can also mean a more pronounced step when placing cargo, which can affect positioning of low or rolling items.
In summary: For longer, flat-lying loads and more continuous cargo space, the Audi A6 Avant is the better choice; for taller or bulkier cargo and greater loading height, the Dacia Duster offers advantages but pays for these with a higher loading edge (making lifting harder) and a different loading geometry.