Trunk comparison: Audi Q3 vs BMW X3

Comparison of trunk dimensions for the Audi Q3 and BMW X3

Key Differences

Both models differ in several aspects of trunk layout. The depth of the trunk (loading edge to trunk floor) of the Audi Q3 is 3.5 in (800%) greater than that of the BMW X3 — this difference is well over 10% and thus particularly significant.

Other deviations are less than 10%: the BMW X3 offers 4.7 in (≈7%) more length with the seats folded down and 2 in (≈6%) more loading length with the front seats upright than the Audi.

The loading edge of the Audi sits 2 in (≈7%) higher above the road; the width at the narrowest point is 3.9 in (10%) greater in the BMW. The width of the trunk opening is the same in both models, the opening height of the BMW is only 0.4 in (≈1%) higher.

Impact on Usability

The significantly greater depth in the Audi Q3 practically means more space below the loading edge: items can be placed deeper and stacked higher without protruding above the loading edge. This is advantageous for tall boxes, beverage crates, or bulky suitcases that need to be stored vertically.

At the same time, the higher loading edge in the Audi (+2 in) makes lifting heavy luggage somewhat more strenuous and complicates easily sliding large, heavy loads directly from the ground into the trunk.

The BMW X3 is slightly longer in loading length (with seats folded down and with the rear seat upright) and wider at the narrowest point — this favors better accommodation of long or crosswise items (e.g., slats, skis, longer furniture parts) and facilitates sliding wider loads through.

The lower loading edge of the BMW makes loading heavy or rollable items more comfortable. However, the differences in opening dimensions are negligible.

In short: If you often need to accommodate tall or stackable cargo, the Audi Q3 wins due to the significantly greater trunk depth.

If you more frequently transport long or wide items or want easier loading of heavy loads, the BMW X3 is better suited due to the longer loading area (with seats folded down), the wider narrow point, and the lower loading edge.