Trunk comparison: Audi A3 Sportback vs Seat Leon
Key Differences (highlighted)
When comparing the trunk dimensions, four differences stand out clearly: The SEAT Leon has a 3.5 in or 56% greater depth between the loading edge and trunk floor, the loading edge of the SEAT Leon is 3.1 in or 12% higher above the ground, the width of the trunk opening is 4.7 in or 12% larger on the SEAT Leon, while the Audi A3 Sportback is 7.1 in or 22% wider at the narrowest point inside the cargo area.
Other differences are less than 10%: With the front seats upright, the SEAT Leon is 2.4 in (8%) longer, and the height of the trunk opening is 1.2 in (4%) larger on the Leon; the overall length with folded seats is the same.
Impact on Usability
The significantly greater depth of the SEAT Leon means more volume vertically behind the loading edge. Practically, this means bulky or tall items can be pushed further back or stacked higher without protruding into the passenger compartment.
At the same time, the higher loading edge makes loading heavy items less convenient — lifting over the edge requires more effort or a ramp.
The wider trunk opening of the SEAT Leon makes maneuvering large items through the rear opening easier (e.g., crates, strollers, or larger boxes).
However, the narrower interior width at the tightest point in the Leon (compared to the Audi) limits the maximum width of items that can actually be placed all the way at the back or to the side.
The Audi A3 Sportback benefits from the greater interior width at the narrowest point: wide, flat items (e.g., furniture parts, wide boxes) can be placed inside more easily, even if the exterior opening is somewhat narrower.
For users who transport many wide items, the Audi is therefore more practical; for those who load rather tall, deep-set, or bulky parts through the opening, the SEAT Leon has the advantage — provided the higher loading edge is not an obstacle.
In short: SEAT Leon = more depth and larger opening (better for tall or bulky passages), Audi A3 Sportback = more usable interior width at the narrowest point (better for wide loads). Smaller differences like the slightly longer loading floor of the Leon with rear seats upright are usually not critical in practice.