Trunk comparison: BMW iX1 vs VW ID.4

Main Differences and Implications for Usability

The VW ID.4 offers two clearly noticeable advantages over the BMW iX1 in the cargo space: the height of the trunk opening is 3.1 in (+11%) larger and the depth from the loading edge to the trunk floor is 3.1 in (+400%) greater.

These two differences result in the ID.4 being better suited for tall or bulky items (more pass-through height) and providing more usable volume or a deeper cargo well where luggage or groceries can lie more securely.

However, these advantages have practical consequences: the larger opening height makes it easier to load tall suitcases or boxes, the deeper loading floor increases the total volume and the load securing behavior.

Working against this is the slightly higher loading edge of the ID.4 (+0.8 in / 3%), which makes lifting heavy items slightly more difficult.

The few other deviations are minor: the ID.4 has a 2.8 in longer lying surface with folded seats (+4%) and 1.6 in more trunk depth with the first row upright (+4%), the narrowest trunk width is only 0.4 in larger (+1%) in the ID.4, while the opening width of the iX1 is 0.8 in (+2%) advantageous for very wide items.

Conclusion: Those who frequently transport tall or low-lying, bulky cargo benefit noticeably from the ID.4 (larger opening and significantly deeper cargo well). For very wide items, the BMW iX1 has a slight advantage; otherwise, the length and width differences are small and hardly relevant for everyday use.