Trunk comparison: BMW i4 vs VW ID.4

Comparison of trunk dimensions for the BMW i4 and VW ID.4

Key Differences

The most noticeable differences lie in dimensions that affect loading and accommodating large or bulky items. The following values are relevant in detail:

Height of the trunk opening: VW ID.4 is 5.1 in (≈19%) higher than the BMW i4.
Width at the narrowest point in the trunk: VW ID.4 is 5.1 in (≈15%) wider than the BMW i4.
Width of the trunk opening: VW ID.4 is 5.1 in (≈14%) wider than the BMW i4.
The trunk depth (loading edge to floor) is the same for both.
The trunk length of the BMW i4 is slightly longer: +1.6 in (≈4%) with the first row of seats upright and +2.8 in (≈4%) with seats folded down.
The loading edge of the VW ID.4 is 1.6 in (≈6%) higher above the road than that of the BMW i4.

Impact on Usability

The VW ID.4’s dimensions being over 10% larger (opening height and widths) make it noticeably more practical in everyday situations for bulky and wide cargo. Specifically, this means:

The higher opening allows tall items (e.g., crates, boxes, strollers with upright handles) to be loaded more easily and gently without needing to tilt or angle them.
The greater width at the narrowest point and the wider opening enable loading wide items (e.g., furniture parts, wide suitcases, large boxes) without complicated maneuvering or disassembly.
For people who frequently transport wide or bulky cargo (moving, household/furniture shopping, sports equipment), the ID.4 offers noticeable advantages in loading and utilizing the volume.
The BMW i4 scores with a slightly longer loading length. This helps when transporting longer, narrow items (e.g., skis, long moldings) — however, the advantage is small (≈4%) and often barely noticeable.
The somewhat lower loading edge of the BMW i4 makes lifting heavy items into the trunk a bit easier; this effect is modest (≈6%) but remains relevant for users who often handle heavy loads.
Since the trunk depth is identical, both models do not differ regarding usable floor space in the depth direction.

Conclusion

If wide or tall items are regularly loaded, the VW ID.4 is the more practical choice due to its significantly larger opening height and widths.

Those who mainly transport longer but not particularly wide or tall cargo or value a lower loading edge when lifting will find slight advantages in the BMW i4 — though these are comparatively small.