Trunk comparison: Audi Q3 vs Peugeot 208

Key Differences
The Audi Q3 offers a significantly larger cargo area in length: with the rear seats folded down, the trunk is 13.8 in (27%) longer, and with the rear bench upright, it is even 9.1 in (34%) longer than in the Peugeot 208. The width of the Audi's trunk opening is 10.2 in (30%) larger, which makes loading wider items easier.
In contrast, the Peugeot 208 has a significantly greater trunk depth difference (distance from loading edge to trunk floor): this is 3.5 in (100%) larger than in the Audi.
What This Means in Practice
Due to the longer cargo areas and the significantly wider opening, the Audi Q3 is clearly better suited for long or wide loads — for example, furniture parts, skis, long planks, or wide boxes. Those who regularly transport bulky or long items benefit from the Q3 with less packing and cutting effort.
The deeper trunk floor of the Peugeot (3.5 in difference) combined with a slightly lower loading edge (the Audi sits 1.6 in higher above the road) results in a significantly lower floor height of the cargo space.
Practically, this means heavy and bulky loads are easier to lift into the 208's cargo area because the total lift from the ground to the cargo floor is less. For frequent lifting of heavy shopping or transport goods, the 208 is therefore more convenient to handle, despite the shorter length and narrower opening.
Small differences like the Audi's 1.2 in higher trunk opening or the 1.6 in larger narrowest width are hardly decisive in everyday use. In summary: Audi Q3 = better in volume, length, and width for bulky loads; Peugeot 208 = easier to load heavy items due to lower loading edge and deeper trunk floor.