Trunk comparison: Seat Tarraco vs VW T-Roc

Quick Overview
The most significant differences concern the cargo length and the depth of the trunk: The Seat Tarraco offers +15.4 in (26%) more cargo length with the seats folded down than the VW T‑Roc, and with the first row upright, it is even +13.4 in (44%) in favor of the Tarraco.
In contrast, the VW T‑Roc has a significantly greater trunk depth (loading edge to trunk floor) of +6.3 in (267%).
Smaller differences: the trunk opening of the T‑Roc is +1.2 in (4%) higher, the loading edge of the T‑Roc is +0.8 in (3%) higher above the ground, the width at the narrowest point is the same, and the opening width of the Tarraco is only +0.8 in (2%) larger.
Impact on Usability
Due to the significantly greater cargo length, the Tarraco clearly has an advantage for long items (e.g., slats, boards, skis, or long furniture parts) and for transport tasks that require space in length.
Even with the first row upright, there remains more usable loading area, making it more flexible for combinations of passengers and luggage. The slightly larger opening width of the Tarraco makes loading wider items slightly easier.
The T‑Roc scores with the significantly greater trunk depth: This creates more usable volume in depth and allows items to be stored deeper and stacked. This can be practical when it comes to volume with a compact footprint or securely stowed luggage under a loading floor.
However, the deeper floor situation also means that items lie deeper and are harder to access; lifting heavy loads in the T‑Roc often requires more bending.
The slightly higher trunk opening and loading edge (+1.2 in and +0.8 in) offer a bit more vertical clearance but make lifting heavy items minimally more strenuous.
Conclusion: Those who frequently transport long or bulky items and need flexible loading lengths benefit more from the Seat Tarraco.
Those who prefer more deep storage space and stacked volume with compact exterior dimensions can benefit from the VW T‑Roc — at the expense of accessibility and somewhat more effortful lifting.