Trunk comparison: BMW X4 vs Hyundai IONIQ

Comparison of trunk dimensions for the BMW X4 and Hyundai IONIQ

Key Differences

There are two notable differences in the dimensions of the cargo area: The BMW X4 has a trunk that is +4.3 in (12%) longer with the rear seats upright compared to the Hyundai IONIQ, while the Hyundai IONIQ has a trunk depth (distance from loading edge to trunk floor) that is +1.6 in (50%) larger than the BMW X4. Other differences (not exceeding 10%) include: BMW offers +3.5 in (6%) more cargo length with folded seats, the trunk opening height of the BMW is +1.6 in (6%) higher, the loading edge of the BMW is +2 in (7%) higher above the ground, the width of the trunk opening of the BMW is +3.5 in (10%) larger, and the narrowest interior width of both models is the same.

Impact on Usability

The longer cargo floor of the BMW X4 with the rear seats upright makes it more practical when regularly transporting bulky, long items without folding down the rear seats (e.g., slats, long boxes, or skis). The length advantage allows better use of the cargo space in the longitudinal direction.

The significantly greater distance from the loading edge to the trunk floor in the Hyundai IONIQ means more vertical usable space in the cargo area (deeper cargo well).

This is advantageous for tall luggage, stackable boxes, or when items should not lie flat. At the same time, a deeper floor can increase the effective capacity with the same base area.

Combining the other values: The higher loading edge of the BMW (+2 in) can make loading and unloading heavy items ergonomically somewhat more difficult, while the IONIQ with its deeper trunk floor and lower loading edge can ease lifting over the threshold and offer more "storage space downward." The slightly larger opening width of the BMW (10%) helps with loading wider items but is not a clearly dominant advantage over the IONIQ.

Conclusion: For frequent transport of long items while the rear seats are occupied, the BMW X4 is the more practical choice. Those who need more usable height/volume in the cargo area or often load tall, stackable luggage will benefit more from the Hyundai IONIQ.