Trunk comparison: Seat Leon vs VW Tiguan Allspace

Key Differences (highlighted values >10%)
There are significant differences in volume and dimensions: The VW Tiguan Allspace offers a longer cargo space when the seats are folded down than the Seat Leon (+16.1 in / +28%) and also remains longer with the first row of seats upright (+11.4 in / +35%).
Conversely, the Seat Leon has a significantly larger trunk with all seats upright (+14.2 in / +77%).
The narrowest width is clearly ahead in the Tiguan Allspace (+7.5 in / +23%), while the trunk opening of the Seat Leon is somewhat higher (+3.1 in / +11%) and its trunk depth (loading edge to floor) is considerably greater (+9.8 in / +2400%, percentage very high due to small reference value).
Implications for Usability
For transporting long or wide items, the Tiguan Allspace is more practical: more length with folded seats and greater narrowest width allow for longer loads (e.g., slats, long furniture parts, bulky items) and make it easier to stow wide boxes or strollers.
The Tiguan is also more flexible when seats are partially used, as it offers more cargo space with the first row upright.
The Seat Leon scores in everyday use with better usable trunk space when all seats are occupied: significantly more depth and a higher opening dimension create more storage space for suitcases, bags, or groceries with full seating.
The larger trunk depth figure also suggests a deeper loading well, which facilitates storing stackable or taller items, while at the same time a deeper loading floor can make lifting heavy loads somewhat less comfortable.
In summary: Those who regularly transport long or wide loads and need flexible cargo areas with folded seats are better served by the VW Tiguan Allspace. Those who often travel with full occupancy and still want more usable storage space in everyday life benefit from the Seat Leon.