Trunk comparison: Mazda Mazda CX-5 vs VW ID.4
Key Differences
Among the measured values, one difference stands out clearly: The depth of the trunk (distance from loading edge to trunk floor) of the VW ID.4 is 2 in and thus 100% greater than that of the Mazda CX‑5. All other deviations are small: Mazda has a 0.4 in longer loading floor with the seats folded down and 0.8 in more length with the first row upright, the narrowest interior width is 1.6 in larger in the Mazda.
The height of the trunk opening and the opening width are each 0.4 in larger in the ID.4. The loading edge of the Mazda is 0.8 in higher above the road than that of the ID.4.
Impact on Usability
The significantly greater depth difference in the ID.4 means more space below the loading edge: this creates additional volume for taller or bulky items that need space below the opening area and simultaneously lowers the center of gravity of the load.
This is advantageous if you pack vertically a lot or want to securely place items deeper in the cargo area. However, the deeper loading edge results in a greater height offset when lifting heavy loads in and out.
The Mazda offers a slightly higher loading edge (+0.8 in), which makes lifting heavy items a bit more strenuous, but its trunk floor sits closer to the road.
Its somewhat larger narrowest interior width (+1.6 in) makes it easier to load wider items through the interior, and the minimally longer interior dimensions with folded or upright seats are hardly noticeable in practice.
The 0.4 in larger opening dimensions in the ID.4 (height and opening width) marginally improve maneuvering bulky items but are negligible in everyday use.
In summary: For transport tasks with a strong need for deeper cargo space and better accessibility with a lower loading edge, the VW ID.4 is better suited; for loading wider items through the interior and a slightly smaller offset to the road, the Mazda CX‑5 is slightly more practical.
Most differences except for the trunk depth difference are small and only minimally affect everyday usability.