Trunk comparison: BMW 5 Series Touring vs Hyundai IONIQ
Key Differences
The BMW 5 Series Touring offers significantly more usable cargo space in length: with the seats folded down, the trunk of the BMW is +10.6 in (17%) longer, and with the first row of seats upright, it is +7.1 in (20%) longer compared to the Hyundai IONIQ.
The width of the trunk opening is +4.7 in (13%) larger on the BMW.
In contrast, the Hyundai shows a very large difference in depth between the loading edge and the trunk floor: this is +4.7 in (1100%) greater in the IONIQ. Additionally, the loading edge of the IONIQ is +3.1 in (12%) higher above the ground than that of the BMW.
Smaller differences, not highlighted: the height of the trunk opening on the BMW is only 1.6 in (6%) larger, and the narrowest point of the BMW's trunk is 2.8 in (7%) wider than on the IONIQ.
Impact on Usability
The longer cargo spaces of the BMW (+17% / +20%) make it more practical for long items such as skis, slats, furniture parts, or wheeled loads, as there is more usable length and loading elongated objects is easier.
The larger width of the opening (+13%) also facilitates loading wider or bulkier goods, as less trimming at the entry height or sides is needed.
The Hyundai offers more interior space behind the loading edge due to the significantly greater depth between the loading edge and trunk floor (+1100%), which is advantageous when stacking or placing lower-lying items — for example, when the cargo needs to fit below the edge.
However, this advantage is offset by the higher loading edge (+12%), which makes lifting heavy items into the trunk more strenuous and maneuvering heavy boxes or furniture more difficult.
In practice, this means: for users who frequently transport long or wide loads, the BMW 5 Series Touring is the better choice due to its length and larger opening.
For users who want to store rather bulky, low-lying cargo (and are not bothered by lifting over a higher loading edge), the Hyundai IONIQ can be practical because of its greater depth.
Smaller differences like the slightly higher trunk opening on the BMW (+1.6 in) or the slightly larger minimum width (+2.8 in) only marginally affect everyday usability.