Trunk comparison: Audi A3 Sportback vs Peugeot 308 SW 3-row

Key Differences (highlighted for >10%)
Cargo volume with all seats upright: The Audi A3 Sportback offers +16.5 in (120%) significantly more trunk length when all seats are upright. This means: in a fully occupied state, there is considerably more space behind the seats in the Audi than in the Peugeot.
Cargo volume with front row upright: In the opposite case — when the front row is upright — the Peugeot 308 SW 3-row has a cargo area that is +12.2 in (40%) longer than the Audi. This indicates more usable cargo space when there is room behind the front seats (e.g., with folded rear seats).
Height of the trunk opening: The Peugeot's cargo opening is +4.7 in (16%) higher than the Audi's. Together with the also wider opening (+6.3 in / 16%), this makes loading and unloading tall or bulky items easier.
Depth of the trunk (loading edge → trunk floor): The Audi has a significantly larger value here: +4.7 in (300%). This means more vertical capacity behind the loading edge.
Height of the loading edge above the road: The Audi's loading edge sits +4.3 in (20%) higher than the Peugeot's, which makes lifting heavy loads more difficult.
Practical Implications / Usability
Everyday use and luggage transport: - If you often drive fully occupied (all seats upright) and still need to transport luggage, the Audi has the advantage: it offers significantly more trunk space behind the seats. - Conversely, the Peugeot is better suited if you frequently fold down rear seats or want to use the space behind the front seats: here it provides a significantly longer loading area.
Loading and unloading large or tall items: - The higher and wider cargo opening of the Peugeot makes loading bulky, tall items (e.g., shelves, boxes, sports equipment) easier. - The lower loading edge of the Peugeot also reduces the effort required to lift.
The Audi requires more strength when loading heavy items due to the higher loading edge.
Vertical capacity and shape of the load: - The greater distance between the loading edge and trunk floor in the Audi creates more deep/low storage space (more "vertical" capacity behind the loading edge).
This is useful for bulky but not necessarily tall items that should lie deep in the trunk. - Combined with the narrower opening of the Audi, very bulky/tall parts may be more difficult to fit compared to the Peugeot.
Summary briefly: - Peugeot 308 SW 3-row: better for easy loading/unloading, larger opening, more length with folded seats → more flexible for bulky/tall loads. - Audi A3 Sportback: clear advantage in space with all seats upright and more depth behind the loading edge → more practical if you often carry notable luggage with full occupancy.