Boot litres and seat counts: what can you really carry?

Boot capacity describes a measured volume, not a promise that a particular suitcase, stroller or wheelchair will fit. A deep but narrow boot can have a large litre figure while a wide rigid object will not pass its opening. Wheel arches, roof slope and the position of the seatbacks all change the usable shape.

Manufacturers may use different measurement conventions, floor positions or loading limits. Before treating one figure as an advantage, check whether both refer to the same conditions: seats up or folded, measured to the cover or roof, and whether underfloor storage is included. If the method is not stated, the numerical difference is only a starting point.

Perodua's Ativa brochure is a useful example: it lists 303 L in upper-tier mode and 369 L in lower-tier mode. Lowering the luggage floor adds depth without changing the exterior size. MyCarSize records 303 L for that entry and explains the floor setting in its reference note.

Powertrain and equipment can also change the usable boot. Honda lists 519 L for the City petrol variants and 410 L for the City e:HEV RS. A search result showing only 'City RS boot capacity' can therefore mix two different cars. Match the exact variant before carrying a figure across to a comparison.

If you need to carry seven people, compare the luggage space while those seats remain available. A maximum figure with seats folded cannot answer whether everyone and their bags will fit together. BYD, for example, lists 180 L minimum and 580 L maximum for the M6; this catalogue uses the minimum figure.

A seven-seat label says how many seating positions the selected configuration provides. It does not rate third-row comfort, access, child-seat compatibility or luggage allowance. Put the second row in the position your passengers need before assessing the third row. Moving it again for the luggage demonstration changes the test.

A useful showroom test uses your own bulky item rather than several small display bags. Measure its folded dimensions, then check the tailgate opening, the narrowest point between the wheel arches, floor length and the height beneath the cover. Try lifting it over the loading lip and removing it again.

Where MyCarSize shows a dash, the capacity has not been recorded for that entry. It is not zero and it should not be used to rank the car below a vehicle with a published number. Ask the dealer for a figure with its measurement conditions, or compare the actual load directly.

1. Set all passenger seats as they will be used on a normal trip.
2. Load the stroller, wheelchair or largest suitcase without folding extra seats.
3. Close the tailgate and check that the load is safely below the intended loading limit.
4. Repeat with the same items and seat positions in the other car.