Trunk comparison: BMW X1 vs VW ID.4

Key Differences

The biggest differences between the BMW X1 and VW ID.4 concern the vertical and depth dimensions of the cargo space. The height of the trunk opening of the ID.4 is 3.1 in (+11%) larger than that of the X1, and the trunk depth (distance from loading edge to trunk floor) of the ID.4 is 2.8 in (+233%) greater.

All other mentioned values differ only slightly: lengths with folded seats or upright front row are 3–4% longer in the ID.4, the loading edge height above the road is nearly 4% higher (ID.4 +1.2 in), and the widths (at the narrowest point and at the opening) are the same.

Impact on Usability

The higher trunk opening (+11%) makes it easier to load tall or bulky items (e.g., suitcases, strollers, bulky boxes) because more clearance height is available and less tilting or turning is needed.

The significantly greater trunk depth (+233%) practically means more usable space behind the loading edge: items can be pushed further forward, creating more space for positioning and stacking longer or taller luggage.

This positively affects cargo volume and flexibility when storing—especially for bulky or stackable loads.

Smaller differences—slightly longer loading lengths in the ID.4 (3–4%) and the 1.2 in higher loading edge—are less relevant for everyday use but can minimally complicate loading and unloading when frequently handling heavy items. Since the widths are the same, there are no restrictions for items placed crosswise.

Conclusion: For users who often transport tall or deeply stackable cargo, the VW ID.4 offers noticeable advantages due to the higher opening and especially the significantly greater trunk depth. For pure width requirements or light luggage, both models are practically equivalent.