Trunk comparison: Fiat Panda vs VW ID.4

Key Differences
The VW ID.4 offers significantly more cargo length: with the seats folded down, its trunk is 22.8 in (≈52%) longer than the Fiat Panda, and with the front row upright, it is 15.7 in (≈74%) longer.
In contrast, the Fiat Panda has a trunk depth (loading edge to trunk floor) that is 3.1 in (≈80%) greater, providing more usable vertical height in the cargo area.
Additional measurements: The height of the Fiat Panda's trunk opening is 3.1 in (≈10%) higher than that of the ID.4; the VW's loading edge is 2 in (≈7%) higher above the ground; the width at the narrowest point is the same, and the ID.4's opening width is 2.8 in (≈7%) larger.
These differences are less pronounced in comparison.
Impact on Everyday Usability
Practical use: Those who want to transport long items (skis, slats, long furniture parts, folded bicycles) clearly benefit from the VW ID.4. The significantly longer cargo floor with folded seats and especially with the front row upright makes the ID.4 more flexible for bulky, long loads.
The Fiat Panda scores with its loading depth: The greater depth and slightly higher trunk opening provide more usable height in the cargo area, making it easier to stack tall or bulky items.
Additionally, the loading edge on the Panda is lower (the VW loading edge is about 2 in higher), which makes lifting heavy loads into the trunk easier.
In summary: For maximum cargo length and transporting long items, the VW ID.4 is the better choice. For frequent loading of tall, bulky, or heavy single items (easier lifting, more interior height), the Fiat Panda is more practical.
Smaller differences in opening width and trunk opening have only a minor effect on everyday usability.