Trunk comparison: Audi A6 Sedan vs Citroen C3

Key Differences

The Audi A6 offers significantly more cargo length: with the seats folded down, the trunk is 23.2 in (≈43%) longer and with the front seats upright even 18.9 in (≈72%) longer than the Citroën C3. In contrast, the Citroën C3 has considerably greater vertical and loading clearance: the height of the trunk opening is 11.4 in (≈58%) higher, the depth from the loading edge sill to the trunk floor is 4.3 in (≈92%) greater, and the loading edge is 4.7 in (≈18%) higher above the road than in the Audi A6. The width differences (narrowest point +2.4 in/6% and opening width +2.4 in/7% in favor of the A6) are minor and therefore not noteworthy.

Impact on Usability

Due to the greater cargo length, the Audi A6 is better suited for long items (e.g., slats, skis, furniture parts) and for more flexible loading options with folded rear seats — it offers more usable length for bulky, flat, or elongated cargo.

The lower loading edge sill of the A6 also makes lifting heavy items into the vehicle easier.

The Citroën C3, on the other hand, is better suited for tall or bulky cargo: the higher trunk opening and greater depth between the loading edge and floor allow for accommodating tall boxes, bulky standing goods, or upright cargo without edge contact.

However, the loading edge being 4.7 in higher increases the effort required to lift heavy loads — which is relevant when frequently lifting or transporting heavy items.

Conclusion: Audi A6 = clear advantages for long and flat loads as well as easier lifting due to the lower loading edge.

Citroën C3 = better accommodation of tall/voluminous items due to larger opening and interior height, but with a disadvantage when loading heavy items because of the higher loading edge. Width differences are negligible.