Trunk comparison: Audi A4 Avant vs Audi A6 Avant

Key Differences

In terms of cargo space, the Audi A6 Avant offers more length, while the Audi A4 Avant has advantages in height and cargo floor profile.

Specifically: the A6 has a +4.7 in (≈11%) longer loading length with the first row of seats upright compared to the A4, whereas with the rear seats fully folded down, the extension is only +5.1 in (≈7%).

The trunk opening of the A4 is +4.7 in (≈16%) higher than that of the A6. Additionally, the depth between the loading edge and the trunk floor is +1.2 in (≈150%) greater in the A4 than in the A6. Smaller differences (opening width +0.8 in, narrowest width +0.4 in, loading edge height above the road +0.4 in) are negligible in practical terms.

Impact on Usability

The greater loading length in the A6 (especially with the rear bench upright) makes it better suited for long items like skis, slats, or long furniture parts when the rear seats are not folded down. This is particularly practical for everyday use where only the first row of seats is relevant.

The higher trunk opening of the A4 makes loading tall or bulky items (e.g., boxes, suitcases, plants) easier because more interior height is available right at the opening. Items can be stored upright more easily.

The greater depth between the loading edge and trunk floor in the A4 practically means more "drop" behind the loading edge: items sit deeper in the cargo area and the usable interior height behind the opening increases.

This improves stability when transporting stacked luggage and reduces the chance of items falling out when opening the trunk, but may require a slightly bigger step when loading heavy items.

Small differences in width and loading edge height (each about ~1–2%) are hardly noticeable in daily use.

Overall: those who regularly transport long items and often keep the rear bench upright benefit more from the A6; those who frequently load and unload bulky or tall cargo without folding the seats have pragmatic advantages with the A4.