Trunk comparison: BMW i4 vs VW Touran

Highlighted Differences (>10%)

BMW i4: The trunk is significantly longer with seats upright (+25.2 in / +188%), the depth from the loading edge area to the trunk floor is significantly greater (+3.5 in / +900%), and the loading edge is higher (+3.1 in / +13%).

VW Touran: The height of the trunk opening is greater (+7.5 in / +28%), the width at the narrowest point is greater (+6.7 in / +19%), and the width of the trunk opening is greater (+3.9 in / +11%).

Impact on Usability

Due to the significantly longer interior space with seats upright, the BMW i4 is better suited for long, slender items (e.g., slats, skis, long boxes), as long as they can be stored along the vehicle's longitudinal axis.

The greater depth of the trunk in the BMW i4 allows for deeper stacking below the loading edge, offering more usable storage space vertically – however, lower areas are less accessible.

The higher loading edge of the BMW i4 also means more effort is required when lifting heavy items into the vehicle. This is a disadvantage for frequent loading and unloading of heavy loads.

The VW Touran scores with bulky, wide, and tall objects: the larger opening height and width as well as the greater minimum width in the trunk make loading tall boxes, crates, strollers, or furniture parts easier. The lower loading edge makes lifting lighter and loading more ergonomic.

With seats folded down, the length differences are small (each +2–3%), so both models can be used similarly for maximum cargo volume in the longitudinal direction.

Overall: BMW i4 = advantageous for elongated, deep cargo; VW Touran = advantageous for tall, wide, or bulky cargo and more comfortable, ergonomic loading and unloading.