Trunk comparison: Kia Ceed vs VW Touran

Key Differences (only values >10%)
When all seats are folded down: The VW Touran offers a cargo floor that is 9.8 in (16%) longer than the Kia Ceed.
When the first row of seats is upright: The VW Touran has a cargo depth that is 8.7 in (28%) longer than the Kia Ceed.
When all seats are upright: The Kia Ceed has a cargo floor that is 17.7 in (132%) longer than the VW Touran.
Height of the trunk opening: The opening of the VW Touran is 4.3 in (15%) higher than that of the Kia Ceed.
Depth of the trunk (loading edge to trunk floor): The Kia Ceed has a value here that is 3.9 in (1000%) greater than the VW Touran.
What do these differences mean in practice?
The Touran clearly has the advantage for longer or bulky cargo when folded down and with the first row upright: the 9.8 in and 8.7 in longer cargo floor makes transporting long items (e.g., furniture, pipes, long boxes) easier without or with minimal folding of the seats.
Additionally, the 4.3 in higher trunk opening on the Touran provides more vertical clearance when loading tall items and makes sliding bulky parts in easier.
The Kia Ceed scores when all seats are in use: with 17.7 in more cargo floor in the upright seat position, it offers significantly more everyday volume for groceries, luggage, or strollers when all passengers are on board.
This makes the Ceed more practical for family or daily use when the rear seats are not folded down.
The significantly greater depth of the Kia (loading edge to trunk floor) means there is more storage space below the loading edge — useful for stowing luggage flush or "hiding" smaller items.
At the same time, a higher loading edge (1.6 in higher in the Ceed, but <10% difference) can make lifting heavy loads a bit more strenuous; this effect is moderate.
Width differences are small and hardly relevant in practice: differences of 2–1.6 in barely affect loading normal suitcases or boxes.
Overall: Touran = better for long and tall loads as well as flexible seat folding; Ceed = better for maximum everyday volume with full seating and more storage space under the loading edge.