Trunk comparison: Audi A3 Sportback vs Durchschnitt Wagon

Main Differences
The average wagon offers a cargo length that is 9.4 in (16%) longer than the Audi A3 Sportback when the rear seats are fully folded down. With the front seats upright, the difference is even more pronounced: the wagon has a usable cargo length that is 9.1 in (30%) longer.
Conversely, the Audi A3 differs significantly in depth between the loading edge and the trunk floor: here the A3 is 4.7 in (300%) higher (greater depth) than the average wagon.
Smaller deviations (under 10%) are: the wagon’s trunk opening is 0.8 in (3%) higher, the A3’s loading edge is 1.6 in (6%) higher above the ground, the narrowest trunk width is 2 in (5%) larger in the wagon, and the wagon’s opening width is 2.8 in (7%) larger.
Impact on Usability
The longer cargo length of the wagon (each 9.4 in / 16% and 9.1 in / 30%) clearly makes it superior for long items (e.g., slats, furniture boards, skis) and for situations where the rear seats should not be folded down.
With the front seats upright, significantly more can be transported in the wagon, making it more practical for everyday and leisure use with occasional long loads.
The significantly greater depth of the A3 between the loading edge and trunk floor (+4.7 in / 300%) means more vertical space behind the loading edge – this can be advantageous when stacking crates or tall items, or when the cargo sits better in a deeper recess.
At the same time, the higher loading edge of the A3 (+1.6 in) requires more lifting when loading, which makes handling heavy loads more difficult. For flat, long, or bulky items, the A3 is less suitable due to the shorter usable length.
The slightly larger opening height and width as well as the marginally greater narrow width in the wagon make it easier to load wide or bulky parts.
Overall: those who frequently transport long or bulky cargo and want easier loading are better served by the average wagon; those who benefit more from deeper cargo recess and additional vertical capacity and can manage the higher loading edge will find strengths in the Audi A3 Sportback.