Trunk comparison: Audi A6 Sedan vs BMW X4

Key Differences (Brief)

The Audi A6 offers a significantly longer cargo area: with the seats folded down, the trunk is 9.1 in (13%) longer, and with the first row upright, 5.1 in (13%) longer than in the BMW X4. Additionally, the loading depth of the A6 is 1.6 in (50% deeper) compared to the X4 (measured from the loading edge to the trunk floor).

In contrast, the BMW X4 has a significantly higher opening: the height of the trunk opening is 7.9 in (40%) greater, and the loading edge is 5.1 in (20%) higher above the ground than in the A6. Smaller differences: the narrowest width of the trunk is only 0.8 in (2%) larger in the A6, while the width of the trunk opening is 3.5 in (10%) larger in the X4.

Impact on Usability

For transporting long or flat items (e.g., furniture, long boxes, skis), the Audi A6 is clearly advantageous due to the longer cargo area both with folded seats and with the rear bench upright.

The greater loading depth in the A6 also makes it easier to load bulky items further into the interior and allows for better stacking with lower loads.

The BMW X4, on the other hand, scores with bulky, tall items: the significantly higher trunk opening allows loading of tall objects that would not fit upright in the A6 due to its lower opening height.

However, the higher loading edge of the X4 means that heavy luggage or bulky loads must be lifted higher — increasing physical effort when loading and unloading compared to the lower loading edge level of the A6.

Conclusion: Those who frequently transport long or flat items or value lower lift heights have more practical conditions with the Audi A6. Those who often carry tall, bulky cargo and benefit from a larger opening will find the BMW X4 to be the more suitable compromise — at the expense of higher loading effort.