Trunk comparison: Audi A6 Avant vs BMW i4

Key Differences

In terms of cargo space, the Audi A6 Avant shows several significant advantages: it offers +7.9 in (11%) more cargo length with the seats folded down and +7.5 in (19%) more usable length with the first row of seats upright compared to the BMW i4. The usable width is also greater in the Audi: the narrowest point of the trunk is +4.7 in (14%) wider and the trunk opening is +3.9 in (11%) wider than in the BMW.

On the other hand, the BMW i4 has a significantly deeper cargo well: the depth (loading edge to trunk floor) is +3.1 in (400%) greater than in the Audi.

Impact on Usability

The longer and wider loading area of the Audi A6 Avant makes it more practical for long or bulky items (e.g., furniture, long pipes, or skis) and for wide loads that require space at the narrowest point.

The larger opening facilitates loading bulky items and reduces difficulties when maneuvering large luggage through the opening.

The deeper floor of the BMW i4 provides a more pronounced cargo well that better holds small or loose items and reduces shifting. However, this well can mean that flat, wide items fit less well because the relative usable length and width are smaller.

Other differences under 10% (e.g., Audi opening height +2.4 in / 9% and BMW loading edge height +2.4 in / 9%) exist but have less impact on everyday use: a slightly higher loading edge in the BMW makes lifting heavy loads a bit more difficult, while the slightly higher opening in the Audi can make loading very tall items somewhat easier.

Conclusion: For frequent transport of long or wide items, the Audi A6 Avant is the more practical choice. If, on the other hand, you value a deep cargo well that securely holds small parts, the BMW i4 is preferable.