Trunk comparison: Audi A4 Avant vs BMW X3

Key Differences

The interior dimensions show a mixed picture: the Audi A4 Avant has a trunk that is 3.9 in (11%) longer with the first row of seats upright, while the BMW X3 is significantly wider at its narrowest point. The trunk depth (loading edge to trunk floor) is 2 in (400%) greater in the Audi A4 Avant.

On the other hand, the loading edge of the BMW X3 is 2.8 in (11%) higher above the ground, which should be considered when loading and unloading. Smaller differences (e.g., opening height +2.4 in/8% and folded length +3%) exist but fall below the 10% threshold.

Impact on Usability

Practically, this means: Due to the 11% longer loading length with the rear seats upright, the Audi A4 Avant is better suited for longer items that need to be transported without folding the seats down.

The significantly greater depth between the loading edge and trunk floor in the A4 creates more usable volume behind the loading edge but can also mean a more pronounced step when loading (compared to a flatter floor).

The BMW X3 scores with its width: the 11% wider narrowest point allows for wider or bulky items that do not fit as easily in the A4. However, the 2.8 in higher loading edge of the X3 makes lifting heavy items more strenuous and can make loading more difficult for one person.

In summary: For longer cargo and more trunk depth, the Audi A4 Avant is more practical; for wider cargo and bulky cross-sections, the BMW X3 is advantageous. Those who frequently load and unload heavy or tall items will benefit from the lower loading edge height of the A4 in terms of handling.