Trunk comparison: Audi A3 Sportback vs Audi Q3

Key Differences

The Audi Q3 offers significantly more space in length: with the seats folded down, the trunk is 6.7 in (+11%) longer, and with the first row of seats upright, it is 5.1 in (+17%) longer than in the A3 Sportback. The width of the Q3's trunk opening is 5.9 in (+15%) larger.

In contrast, the A3 Sportback has a significantly greater depth in the cargo area (distance from loading edge to trunk floor): this is 2.8 in (+78%) higher than in the Q3. Additionally, the loading edge of the Q3 sits 3.1 in (+12%) higher above the road than in the A3; other dimensions (e.g., opening height, narrowest width) differ by only about 1% and are therefore negligible.

Impact on Usability

The longer loading surface and larger opening of the Q3 make it more practical for long or wide items (e.g., furniture parts, long suitcases, or bulky boxes) and increase the usable volume with seats folded down or upright. The wider opening facilitates loading large, flat items.

The A3, on the other hand, scores in handling heavy or lower-lying cargo: the significantly greater trunk depth combined with a lower loading edge means heavy items need to be lifted less high and sit lower — this lowers the cargo's center of gravity and makes securing luggage easier.

Those who frequently load heavy suitcases or shopping bags will find loading in the A3 more ergonomic.

In practice, this means: Q3 = better for volume, length, and wide, bulky cargo; A3 = more comfortable, lower, and deeper cargo space for heavier, more compact items.

The choice depends on whether you value more storage space and loading opening (Q3) or a lower loading edge and deeper cargo area when handling heavy loads (A3).