I regularly will stuff about 1.5-2 weeks worth of groceries in the back of my coupe.
When I moved - my smart was a week old, so I didn't really want to use it. I had my Mac G4 tower in its box, my 15" LCD in box, a HP laserjet 6L, 17" iMac (in box), 3 piece speaker set with a huge subwoofer (it has 2 8" subs in it), 2 laptops, 4 external hard drives - plus other crap. It was literally in the middle of a hurricane, and I wanted my computer stuffs to be safer than my leaky U-Haul, the VUE was stuffed to the gills - as was my friend's Sunfire.
I drove from Baltimore to DC in an ice storm with an IKEA Poang Armchair, Poang footstool, cushions, a lamp, and some other stuffs all still packed up... that was hilarious - the cushions were so wide I was pinned against the driver's door when I closed it.