Trunk comparison: Opel Corsa vs Tesla Model 3

Key Differences
The Tesla Model 3 offers a significantly longer cargo space: with the seats folded down it is +21.7 in (42%) longer and with the front seats upright +16.1 in (62%) longer than the Opel Corsa. The trunk opening of the Tesla is wider: the opening width is +5.5 in (16%) larger than the Corsa.
The Opel, however, has the advantage in vertical capacity: the height of the trunk opening is +8.3 in (40%) larger and the depth from the loading edge to the trunk floor is +2.8 in (64%) greater than the Tesla.
Concrete Effects on Usability
Thanks to the significantly greater loading length in the Model 3, long items (e.g., skis, slats, furniture panels, or longer boxes) can be transported much more easily — even when the rear seats are upright.
The wider opening of the Model 3 also makes it easier to load wide, flat, or bulky items that need to fit across the opening.
The Opel Corsa scores with height and interior depth: a higher opening and deeper interior make loading and standing tall items (large suitcases, tall boxes, upright furniture) easier and create more vertical space. This can be crucial when stacking crates or transporting bulky but not particularly long goods.
Small differences that usually hardly matter in practice: the loading edge of the Corsa is only about 1.2 in higher (+4%) above the road and the narrowest interior width differs by only ~0.4 in (+1%) — both are negligible factors in everyday use.
Conclusion: Those who frequently transport long or wide items benefit from the Tesla Model 3. Those who more often need to carry tall or bulky, upright loads are better served by the Opel Corsa.