Trunk comparison: BMW 5 Series Touring vs Kia Ceed

Biggest Differences
The most significant differences concern the cargo lengths and trunk depth. The BMW offers a cargo space that is 14.2 in (23%) longer with the seats folded down and a cargo space that is 11.8 in (38%) longer with the first row of seats upright compared to the Kia.
The Kia, on the other hand, has a significantly greater depth (loading edge to trunk floor): +4.3 in (1000%) compared to the BMW.
Smaller differences (opening height +2 in/7% in favor of Kia, same loading edge height, width at the narrowest point BMW +1.6 in/4%, opening width BMW +2.4 in/6%) exist but are under 10% and are not highlighted here.
Impact on Usability
BMW 5 Series Touring: Due to the significantly longer cargo areas, the Touring is clearly better suited for long items (skis, slats, long moving goods) and for larger luggage quantities when seats are folded down or more cargo width is needed at the front.
The slightly greater width at the narrowest point and the larger opening width improve loading of bulky, elongated items.
Kia Ceed: The greater depth (significantly more space below the loading edge due to the floor) and the slightly higher trunk opening make the Ceed more practical for tall or bulky items that are more likely to be placed deep rather than slid lengthwise (tall boxes, stacked crates).
The slightly higher opening facilitates storing tall cargo.
Practical Conclusion: Those who often need to transport long items or maximum cargo length are better served by the BMW. Those who more frequently transport tall, bulky, or cargo stacked in depth benefit from the Kia.