Trunk comparison: Audi A6 Sedan vs BMW i4

Space and Cargo Volume

The Audi A6 offers noticeably more usable cargo space: with the seats folded down, the trunk of the A6 is 7.5 in (11%) longer, and with the first row upright even 6.7 in (17%) longer than the BMW i4. Additionally, the usable depth (loading edge to trunk floor) in the A6 is 0.8 in (20%) greater, and at the narrowest point it is 5.5 in (16%) wider.

The width of the trunk opening is the same for both models.

Access and Handling

The BMW i4 has a significantly higher trunk opening: the opening height is 6.7 in (34%) above that of the A6, which makes loading tall items easier. However, the loading edge of the i4 is only 1.6 in (6%) higher above the road than the A6, a smaller difference.

Impact on Usability

For users who regularly transport long, wide, or flat loads (e.g., skis, long packages, flat furniture), the Audi A6 is more practical: the greater length with folded or upright seats, the greater depth, and the higher width at the narrowest point offer more space and storage capacity.

The BMW i4 scores when frequently loading tall items (e.g., plants, tall boxes): the significantly higher opening height facilitates vertical loading.

However, the slightly higher loading edge in the i4 requires more effort when lifting, and the overall smaller interior length and width noticeably limit the cargo volume for bulky, elongated, or wide items.

Conclusion: Audi A6 = better for volume, length, and width; BMW i4 = better for tall items and easier vertical access, but with limitations in volume and lifting effort.