For it’s size HR-V has quite comfortable space arrangement. In 2002 it was decided by the Honda to provide these figures. You may find over 285 liters of space in HR-V having put down the back seat. The trunk shape of Honda’s design proves to be useful. In Honda HR-V you get 285 liters of free space in the trunk.
Honda proves it to be wise decision of making cargo capacity at 285 liters. Check also if your luggage in 2001 Honda isn’t heavier than needed. It’s easy to overload Honda HR-V but try to avoid this.