Not so much in weight, but I once crammed two armchairs into the back of a Range Rover Classic, plus the 3-seater sofa up top on two roof bars.
Incredibly, when interlocked (69 position!!! ) with the rear seats down both chairs fitted inside and the top and bottom tailgates actually closed properly!!!
Bought them off ebay and coincidentally the couple I bought them off were Land Rover nuts. They too were amazed I could drive away with all three items so easily.
couple of times lately, i`ve had 25 bags of ballast and cement (approx 750kg) in the boot of my d2. had to start the engine and pump the suspension up halfway through loading. but seems ok with it.
Most weight was 55 x 25 kg bags in the rear but most load would have been coming back from a local show towing the show trailer, with a grittier in the pickup snowplough on the front and 2 garden benches and a table on the roof of the 110. Have a photo somewhere