Excluding the X Series models, the boot with the largest volume with all the seats in place is in the BMW 3 Series Touring models, with 495 litres. Seats down the volume is 1,500 litres, although in this mode the 2 Series Active Tourer and Gran Tourer have a greater boot volume.
The BMW 220d xDrive Active Tourer has a boot that measures 468 litres with seats up, 1,510 litres with seats down.
The Gran Tourer’s boot is 145 litres with all the seats in place, but with the 3rd row folded down the volume is 560 litres, increasing to 1,820 litres with the second row also folded. Note also that there’s no lip on the boot sill, providing easy access, and the removable parcel shelf stores under the boot floor, out of the way.
If you include the X Series models, the X5 has the biggest boot, at 650 litres. Seats down this increases to 1,870 litres.