Trunk comparison: Audi A4 Avant vs BMW 3 Series Touring

Key Differences and Their Significance

The Audi A4 Avant offers two notable advantages over the BMW 3 Series Touring: the height of the trunk opening is +5.1 in (+18%) larger on the Audi, and the depth of the trunk (loading edge to trunk floor) is +1.6 in (+400%) greater.

These two differences are the only ones over 10% and have the strongest impact on practical usability.

The higher trunk opening of the Audi makes loading tall or bulky items easier because more vertical space is available; this is practical for furniture pieces, tall boxes, or suitcases.

The significantly greater depth means the cargo space in the Audi is shaped deeper — items can slide further "downwards," increasing the usable volume for tall or irregularly shaped cargo and making the load more stable at the bottom.

At the same time, a deeper loading floor can make loading and unloading very heavy items further back more difficult because you have to reach further or lean into the trunk.

All other differences are relatively small: the A4 has a slightly longer loading floor (+3.1 in with seats folded down, +2 in with the first row upright), a loading edge that is +1.2 in higher (+5%), as well as slightly more width at the narrowest point (+1.6 in / 4%) and at the opening (+0.8 in / 2%).

These dimensions slightly improve usability — more cargo length helps transport longer items like skis or slats, and a bit more width makes storing wider boxes easier — but only marginally change everyday practicality.

Conclusion: Those who frequently transport tall or bulky items and benefit from greater vertical clearance and a deeper cargo space have a clear advantage with the Audi A4 Avant.

Those who mainly lift heavy, bulky items and value a lower loading edge for easier lifting may find a slight advantage in the BMW 3 Series Touring due to its marginally lower loading edge and overall more compact dimensions.