Trunk comparison: Audi A4 Avant vs Renault Clio

Key Statements
Significant differences (only >10% highlighted): The Audi A4 Avant offers with folded seats a trunk that is +20.1 in (39%) longer and with the first row of seats upright a trunk that is +13.4 in (48%) longer than the Renault Clio. The trunk opening of the A4 is +4.3 in (15%) higher.
The depth from the loading edge to the trunk floor is +28.3 in (1440%) greater in the Clio than in the A4. Additionally, the loading edge of the Audi is +15.4 in (163%) higher above the road than that of the Clio. The width differences (±0.8 in / 2%) are negligible.
Impact on Usability
Space for long and bulky cargo: Due to the significantly greater loading length in the Audi (±39–48% more), the A4 Avant is clearly better suited for long items such as furniture parts, slats, or skis inside the cabin. The higher trunk opening (+4.3 in) makes it easier to load tall items vertically.
Lifting and handling heavy loads: The Renault Clio has a significantly lower loading edge (the A4 is +15.4 in higher).
Combined with the greater depth from the loading edge to the trunk floor in the Clio, this means: Heavy items can be pushed onto or unloaded from the cargo area more easily in the Clio because less lifting force is needed against the height of the loading edge.
In the A4, lifting onto the higher loading edge is more strenuous.
Trunk depth: The significantly greater depth (loading edge→floor) specified for the Clio suggests that its floor lies well below the loading edge.
Practically, this means: Bulky but low-profile cargo can be better "recessed" in the Clio, while the A4 offers a shallower cargo volume in the driving direction with the same build.
For long, relatively flat cargo, the A4 is advantageous; for bulky, deeper-sitting items or for pushing heavy loads in, the Clio is more practical.
Everyday use: For regularly transporting large/tall items or when maximum length is needed, the A4 Avant is the better choice. For frequent loading of heavy groceries, boxes, or comfortable loading and unloading at a low level, the Clio is more comfortable due to the lower loading edge and greater depth.
Summary
The Audi A4 Avant scores with significantly more cargo length and a higher opening—better for long and tall cargo. The Renault Clio scores with a lower loading edge and deeper cargo floor—better for easy pushing in and handling heavy or deeper-sitting items. Width differences are negligible.