Trunk comparison: Audi A4 Avant vs Hyundai Kona

Key Differences
The most noticeable difference concerns the usable cargo volume with the first row of seats upright: The Audi A4 Avant offers +7.5 in (+22%) more length in the trunk than the Hyundai Kona, which means significantly more storage space without folding down the seats.
Other measurements differ only moderately: With the seats folded down, the Audi is 6.7 in (10%) longer, the trunk opening of the Audi is 2.8 in (9%) higher. The loading edge of the Kona is 2 in (8%) higher above the road.
The depth (loading edge to trunk floor) is the same, the narrowest width in the trunk is 2 in (5%) larger in the Kona, and the opening width of the Kona is 0.8 in (2%) larger.
Impact on Usability
The 22% longer cargo length of the Audi with the rear seats upright makes it significantly better suited when regularly transporting luggage or long items without displacing passengers (e.g., suitcases, sports equipment, long packages).
The larger cargo volume without folding increases everyday practicality for families and professional users who carry both people and luggage.
The 10% longer loading surface in the Audi with folded seats is useful for occasional transport of large loads but has less impact here than the 22% difference with the seats upright.
The slightly higher trunk opening of the Audi (+2.8 in) makes it easier to load tall items; on the other hand, the higher loading edge in the Kona (+2 in) makes lifting heavy loads somewhat more difficult.
The identical trunk depth means that floor area and base area for flat items are comparable.
The Kona has slight advantages at the narrowest point and in opening width (+2 in and +0.8 in respectively), which can be helpful in some cases when loading very wide or irregularly shaped items, but overall does not compensate for the significantly greater total length of the Audi.
Conclusion: Those who frequently transport a full load of passengers plus a lot of luggage or long items benefit significantly from the Audi A4 Avant.
The Hyundai Kona is slightly more practical in tight situations and when fitting very wide items due to its somewhat larger narrow width but offers less overall cargo space.