Trunk comparison: BMW X3 vs Jeep Avenger Electric

Largest Measurable Differences
The BMW X3 has a significantly longer trunk: with the seats folded down, it is 17.3 in (33%) longer, and with the first row upright, it is 11 in (42%) longer than the Jeep Avenger Electric.
At its narrowest point, the X3's trunk is 7.9 in (22%) wider, and the trunk opening of the X3 is 5.1 in (13%) wider than that of the Avenger.
The depth of the trunk (distance from loading edge to trunk floor) is 4.3 in (1000%) greater in the Jeep Avenger than in the BMW X3. The height of the trunk opening is the same in both models; the loading edge of the Avenger is only slightly higher (+0.8 in / 3%) above the ground.
Implications for Usability
The greater trunk length of the BMW X3 (both with folded and upright seats) makes it better suited for long items such as skis, furniture parts, or long boxes – such loads can be accommodated much more easily in the X3. The greater width at the narrowest point and the wider opening in the X3 facilitate loading wider or bulkier items and increase the actual usable cargo space.
The deeper trunk of the Jeep Avenger (greater distance from loading edge to floor) means the cargo area has a larger recess: this can help to sink items deeper and reduce front load, but makes lifting heavier items somewhat more cumbersome.
Since the loading edge of the Avenger is only minimally higher (+0.8 in), this disadvantage when lifting is only slightly noticeable.
In short: For transporting long or wide goods and easy loading, the BMW X3 is clearly advantageous due to significant length and width benefits.
The Jeep Avenger offers a different loading geometry through the deeper cargo floor, which can be advantageous for deeper, less bulky loads, but overall is less flexible for large or bulky items.