You spot an SUV you like, compare prices, engine options, and fuel consumption. Then on delivery day, the stroller doesn’t fit in the trunk. This scenario happens more often than we think, and the causes go far beyond mere oversight. Between inflated volumes by manufacturers, batteries eating up space, and declining modularity, the trunk size deserves a much more rigorous examination than just reading a technical sheet.
Announced trunk volume vs. actual volume: why the gap is so large
The number in liters displayed in a sales brochure tells only part of the story. Trunk volume measurement standards are not harmonized among manufacturers in Europe. Some measure up to the ceiling, while others stop at the shelf. Some brands include underfloor storage in the total, while others do not.
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The German organization ADAC has documented these disparities: two vehicles showing the same volume on paper can have differences of several dozen liters in actual loading capacity. Before making a purchase, the most reliable reflex is to go to the dealership with the items you transport every week: sports bag, groceries, carry-on suitcase. A physical test is worth more than a comparison chart.
You can also discover the Auto Tech guide that details common mistakes on this subject and offers a reading grid suited to recent models.
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Trunk of hybrid and electric cars: the battery changes everything
Have you noticed that the same model can lose a lot of trunk liters when switching from the thermal version to the hybrid or electric version? It’s a common trap. The traction battery, located under the floor or at the rear, mechanically reduces the available space.
Comparative tests published by L’Argus and Auto Plus on models like the Renault Captur, Peugeot 308, or Toyota Corolla hybrid show significant net volume decreases between the thermal version and the electrified version. The problem is that many buyers compare “the same car” without checking the detailed technical sheet of each engine option.
The reflex to adopt at the dealership
When you are hesitating between two engine options of the same model, always ask for the specific trunk volume for the version you are interested in. Do not rely on the generic volume displayed on the online configurator, which sometimes corresponds to the most advantageous version in the catalog.
Also check the height of the loading threshold. On some electrified versions, the trunk floor is raised by several centimeters due to the battery. Loading a hard suitcase or a flat-pack piece of furniture then becomes more cumbersome, even if the announced volume seems correct.
Trunk modularity in 2026: what manufacturers are quietly removing
Raw size isn’t everything. A trunk of average volume but well modular (split bench, adjustable floor, tie-down hooks) often proves more practical than a larger but rigid trunk. The problem is that modularity is declining in several segments.
European regulations on CO2 emissions and vehicle weight are pushing some manufacturers to lighten their models. The concrete result for the buyer:
- The spare wheel disappears in favor of a repair kit, but the space freed up is not always usable for storage
- The adjustable double-position floor, once common on family sedans and SUVs, is simplified or disappears on entry-level trims
- The split bench in 40/20/40 is being replaced by the 60/40, which is less versatile when you want to transport a long object while keeping two seats in the back
Before signing, fold down the rear seats yourself at the dealership. Check if the floor forms a flat surface once the backs are lowered. A drop of a few centimeters is enough to make it impossible to slide a mattress or a bike flat.
Loading threshold and trunk shape: the forgotten criteria
Why don’t two trunks of identical volume perform equally in use? Shape matters as much as capacity. A deep but narrow trunk complicates loading boxes or grocery bags side by side. A wide but shallow trunk limits the transport of suitcases laid flat.
The height of the threshold, a detail that weighs heavily
A low loading threshold reduces physical effort and protects the bumper. On raised SUVs, the threshold can reach a height that makes loading heavy objects cumbersome. This criterion becomes critical if you regularly load groceries, DIY equipment, or a wheelchair.
Also consider the hatch opening. Some compact models have a hatch that requires a lot of clearance to open fully. In underground parking or in a tight spot, you won’t be able to access the trunk. Adjustable opening hatches or hands-free opening trunks solve this problem, but these options are not always available on all trims.
A checklist before purchase
To avoid unpleasant surprises, here are the points to physically check at the dealership:
- Load and unload your everyday items (stroller, sports bag, groceries for four people) into the trunk of the exact model you are considering
- Check for the presence or absence of a flat floor once the bench is folded down
- Measure the height of the threshold with your hand: if it exceeds the height of your knee, loading will be cumbersome on a daily basis
- Open the hatch in a restricted space to test the actual swing
The trunk is one of the few elements of a car that we use every day without being able to modify it after purchase. A loading test in real conditions is worth more than any online comparison. Take ten minutes at the dealership to do this test: it’s the best investment before signing an order form.