Trunk comparison: Audi A4 Avant vs Jeep Renegade

Key Differences
The Audi A4 Avant offers a significantly longer usable length: with the seats folded down, the trunk is 11.8 in (20%) longer than the Jeep Renegade; with the first row upright, it is even 11 in (36%) longer.
The narrowest width of the cargo area is 1.2 in (3%) greater in the A4, and the width of the trunk opening is 1.6 in (4%) wider — both smaller differences. The trunk opening of the Renegade is 1.6 in (5%) higher than the A4 (a minor difference).
The Jeep Renegade mainly differs in height: the depth from the loading edge entrance to the trunk floor is 3.5 in (180%) greater than in the A4, and the loading edge is 5.1 in (21%) higher above the road.
Implications for Usability
The significantly longer loading length in the A4 Avant makes it easier to transport longer items (e.g., slats, skis, long furniture parts), even without folding down the front row of seats.
The slightly greater narrow interior width and the somewhat wider opening support loading wider, flat items. Additionally, the lower loading edge in the A4 reduces the effort required to lift heavy loads into the trunk.
The Jeep Renegade scores with more interior height/depth and a higher loading edge.
The greater depth from the loading edge entrance to the floor and the overall higher position of the loading edge create more vertical space in the rear, which can facilitate storing tall or bulky cargo, especially when shorter lengths suffice.
However, the higher loading edge means more lifting effort when loading heavy items and can make loading less practical for people with limited mobility.
In summary: Those who prefer longer or flatter cargo and easier lifting are better served by the Audi A4 Avant. Those seeking more vertical space in the rear and an overall higher, spacious-feeling cargo area (with a more compact loading length) benefit more from the Jeep Renegade.