Trunk comparison: Citroen C3 vs Peugeot 5008

Key Differences (Summary)
The Peugeot 5008 offers significantly more cargo length with the seats folded down: +20.5 in (38%) compared to the Citroën C3. Even with the first row of seats upright, the 5008 is +15 in (57%) longer.
In contrast, the Citroën C3 has more cargo length with all seats fully upright: +13 in (97%) compared to the 5008. Furthermore, the 5008's trunk is +7.5 in (20%) wider at its narrowest point and the trunk opening is +9.8 in (28%) wider than the C3's.
The trunk depth measurements differ significantly for the Citroën: the depth (loading edge to trunk floor) is +8.7 in (2200%) greater in the C3, and the loading edge is +3.5 in (13%) higher above the ground. The height of the trunk opening differs by only 0.4 in (1%), which is negligible.
Impact on Usability
For large, long, or wide cargo (e.g., furniture, long slats, large boxes), the Peugeot 5008 is more practical: the significantly greater loading length with folded seats, as well as the larger minimum width and wider open loading opening, make loading easier and provide more usable space.
This means that when transporting large items, the 5008 can accommodate significantly more and is easier to load.
If all seats are needed upright (more passengers), the Citroën C3 offers the longer usable cargo space (+13 in), which is advantageous in everyday use with a full load for longer luggage behind the rear seats.
The greater trunk depth in the C3 (loading edge → floor) also means that items can be recessed further down, reducing visible storage space and allowing certain loads to lie more stably.
However, this is offset by the higher loading edge of the C3 (+3.5 in): heavy items must be lifted higher when loading and unloading, which makes handling more difficult.
For frequent loading and unloading of heavy loads or for low loading situations, the Peugeot 5008 is more practical due to the lower loading edge. It is also clearly better suited for wide, bulky items.
The C3 scores in everyday scenarios with full seating and for items that benefit from a deeper loading floor but has a disadvantage in handling heavy loads due to the higher loading edge.