Trunk comparison: BMW i4 vs Kia Ceed
Key Differences
In terms of length dimensions, the BMW i4 is clearly ahead: The trunk is 8.7 in (≈14%) longer with the seats folded down than the Kia Ceed, and with the front seats upright, the advantage is 7.5 in (≈24%).
The Kia Ceed, on the other hand, has advantages in the opening and the narrow spots in the cargo space: The height of the trunk opening is 3.1 in (≈12%) higher than the BMW's, and the width at the narrowest point of the trunk is 5.9 in (≈17%) wider than the BMW's.
Smaller differences under the 10% mark include: the loading edge of the BMW i4 sits about 1.6 in (≈6%) higher above the road, the depth of the trunk (loading edge to trunk floor) is only about 0.4 in (≈10%) greater in the Kia Ceed, and the width of the trunk opening is about 2.4 in (≈6%) wider in the Ceed.
Impact on Usability
The longer cargo space of the BMW i4 improves usability for long items and with the rear seats folded down: skis, long furniture parts, ladders, or bulky boxes can be stored more easily lengthwise. Those who regularly transport larger volumes by utilizing the depth also benefit from the longer loading surface.
The Kia Ceed is more practical when it comes to bulky, wide, or tall items: The higher trunk opening makes loading tall items easier and reduces the risk of hitting the upper edge.
The significantly larger minimum width in the cargo area also makes the Ceed more suitable for wide items or for storing several suitcases side by side at the same time.
Practically, this means: furniture with wide cross-sections, transport boxes, or wider shopping loads often fit better in the Ceed without awkward angles.
Other practical differences: The slightly higher loading edge of the BMW i4 (about 1.6 in) makes lifting during loading slightly more strenuous, while the marginally greater trunk depth in the Ceed (about 0.4 in) hardly matters in practice.
Overall: for lengthwise transported loads and maximum usable cargo space, the BMW i4 is better; for wide, bulky, or taller items and easier loading, the Kia Ceed has the advantages.