Trunk comparison: Audi A3 Sportback vs VW T-Roc

Key Differences (>10%)
Several dimensions are significantly larger in the VW T-Roc: the height of the trunk opening is +3.5 in (≈12%) higher, the depth of the trunk (loading edge to trunk floor) is +2.4 in (≈38%) greater, the loading edge above the road is +3.9 in (≈15%) higher, and the width of the trunk opening is +6.3 in (≈16%) wider than in the Audi A3 Sportback.
Implications for Usability
These differences noticeably affect everyday usability: the larger opening height and significantly wider opening make it easier to load bulky or wide items (e.g., strollers, large suitcases, bulky furniture parts) — they fit more easily through the opening and can be positioned higher.
The significantly greater "depth" of the trunk means more usable interior space in the vertical/front direction, allowing taller or more stacked cargo to be stored with fewer restrictions.
On the other hand, the higher loading edge of the T-Roc makes lifting heavy loads in more difficult because you have to lift further over the loading edge; with the A3's lower loading edge, loading is physically less strenuous.
For users who frequently transport heavy loads or have limited mobility, the A3 can be more practical here.
Small differences such as trunk length with seats folded or upright (+1%) and the narrowest width (+2%) are negligible and hardly affect everyday usability.
In summary: the T-Roc offers noticeably better accessibility and interior shape for bulky, tall, or wide cargo, while the A3 scores with a lower loading edge for easier lifting. The choice therefore depends on whether a wide/tall loadable area or easy loading and unloading is more important.