I did the same thing with the old FN2 Civic Type R I had. With the seats down in the rear it was surprising how much you could get in it but still it did have it's limitations.
Only just got my 6ft tall metal cabinet in it and that was after I had dismantled it, ...drilling out rivets etc to make it more or less a flat pack.
I've spent much of the last few weeks using my Civic as a van while moving house, its incredibly practical :yawn: