You also may put the back seat of 350Z down to receive more space than 235 liters. For it’s size 350Z has quite comfortable space arrangement. The trunk shape of Nissan’s design proves to be useful. It’s possible to arrange 235 liters of things in Nissan 350Z cargo space. In 2009 it was decided by the Nissan to provide these figures.
Check also if your luggage in 2009 Nissan isn’t heavier than needed. Otherwise you can cause great problems for Nissan 350Z by loading it. Nissan proves it to be wise decision of making cargo capacity at 235 liters.