The back of the VX is the same size as the back of the CX, DX, and Si hatches of the same model years. The interior space in the back of my 92 CX hatch with the back seats down is a cube roughly 4'x4'x2' high. If you need more room you can always pull out the front passenger's seat, or do like I did on my CX, construct a boattail and extend the interior into it (which in addition to adding additional interior cargo space, greatly improves the mileage).
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