Trunk comparison: Audi A3 Sportback vs Peugeot 3008

Key Differences
The Peugeot 3008 offers a noticeably longer cargo space: with the front seats upright, it is 8.7 in or +29% longer, and with the seats folded down, 7.1 in or +12% longer than the Audi A3 Sportback. The loading edge of the Peugeot is 5.1 in or +19% higher above the ground compared to the Audi.
In contrast, the Audi A3 Sportback has a significantly greater depth between the loading edge and the trunk floor: plus 2 in or +45%. Smaller differences such as widths (±2–5%) and opening height (+0.4 in / 1%) are practically negligible.
Impact on Usability
The longer cargo space of the Peugeot makes it better suited for longer items (e.g., furniture parts, skis, long boxes) and for more flexible use with folded or upright rear seats.
However, the higher loading edge of the Peugeot makes loading and unloading heavy items somewhat more difficult, especially with frequent transport of large loads.
The Audi scores with its significantly deeper loading floor: the greater depth allows more vertical storage and luggage can be recessed deeper, which improves the interior stability of stacked loads.
Combined with the lower loading edge of the Audi, handling heavy or bulky packages is more comfortable and physically less demanding.
Conclusion: For longer or irregularly shaped loads and more variable seat configurations, the Peugeot 3008 has the advantage.
For frequent loading and unloading of heavy items and better handling at a lower loading height, the Audi A3 Sportback is more practical. Smaller differences in width and opening hardly affect everyday usability.