Trunk comparison: Tesla Model Y vs VW Passat Wagon

Key Differences
The VW Passat Wagon offers somewhat different cargo characteristics compared to the Tesla Model Y. When the seats are folded down, the Passat's trunk is 2.8 in (4%) longer; with the first row of seats upright, the length difference is 0.8 in (2%) in favor of the Passat.
The narrowest width in the trunk is 2.4 in (6%) greater in the Passat, and the width of the trunk opening is 1.6 in (4%) wider. The loading edge of the Tesla is 2.4 in (9%) higher above the ground than that of the Passat.
Significantly larger differences exist in the height of the trunk opening (+3.9 in / +14% in favor of the Passat) and in the depth of the trunk, measured from the loading edge to the trunk floor (+3.5 in / +800% in favor of the Passat).
These two values stand out clearly in percentage terms compared to the other differences.
Implications for Usability
The 14% higher trunk opening of the Passat makes loading tall items easier: bulky boxes, furniture parts, or upright furnishings fit more easily into the opening without needing to be tilted or inserted diagonally.
Together with the slightly greater width (even if smaller percentage-wise), this makes the Passat overall more practical for long, tall, or bulky cargo.
The significantly greater depth of the Passat means that the cargo area interior lies further below the loading edge.
This increases the usable interior volume vertically but can make lifting heavy items over the loading edge more difficult: with the Passat, more vertical lifting over the edge is required when loading, whereas with the Model Y, many items can be more easily slid into the interior because the distance from the loading edge to the floor is significantly less.
Smaller differences such as the 4–2.8 in longer cargo length in the Passat or the 2.4 in higher loading edge of the Tesla (9%) have only moderate effects: the Passat is minimally more flexible for longer items, while the Tesla Model Y has a slight disadvantage when lifting from the ground due to the higher loading edge.
Overall, this practical picture emerges: for frequent transport of tall or bulky items, the Passat is advantageous; for easy, quick loading and unloading of heavy or bulky items, the Model Y's flatter trunk floor-to-loading-edge ratio can be more convenient.