Trunk comparison: BMW X3 vs Opel Grandland
Key Differences (from the info text)
Two differences stand out clearly from the data: The Opel Grandland has a significantly greater depth between the loading edge and the trunk floor (+6.3 in / +1500%) and a higher loading edge above the road (+3.1 in / +11%) compared to the BMW X3.
Other, smaller deviations: the BMW X3 offers a slightly longer loading length with folded seats (+3.5 in / +5%) and with the first row upright (+2.4 in / +7%).
The trunk width at the narrowest point is +3.5 in (9%) larger in the BMW, the trunk opening is +1.6 in (4%) wider in the BMW. The height of the trunk opening is +0.8 in (3%) higher in the Opel. These differences are all under 10% and thus moderate.
What are the practical implications?
Greater depth in the Opel (+6.3 in / +1500%) means: Items lie deeper below the loading edge in the Opel.
Advantage: Bulky or tall cargo can be stacked more securely and shifts less; smaller parts disappear further into the cargo space. Disadvantage: Placing very flat items can be less practical, and visual inspection into the cargo area is limited.
Higher loading edge in the Opel (+3.1 in / +11%) mainly affects comfort during loading and unloading: Heavy boxes or bulky items have to be lifted higher, making loading and unloading of trolleys or furniture more strenuous.
For rolling suitcases or bulky, heavy cargo, the BMW with its lower loading edge is more ergonomic.
The moderate advantages of the BMW X3 in length (+5–7%) and width at the narrowest point (9%) mean specifically: longer items (e.g., slats, skis, or long boxes) and somewhat wider cargo tend to fit better in the BMW.
The slightly larger opening width in the BMW makes it a bit easier to slide in wider parts. The slightly higher opening height in the Opel (+3%) is hardly relevant in practice.
Conclusion — which model is more practical for whom
If you often transport heavy loads that are hard to lift or many rolling suitcases, the BMW X3 is more practical thanks to its lower loading edge and easier accessible cargo space.
If, on the other hand, you frequently carry high-volume or bulky, tall items and value a deep trunk floor for secure stowing, the Opel Grandland offers advantages due to the significantly greater depth — albeit at the cost of higher lifting effort when loading and unloading.