There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
In fact, I don't know if Jaipur was or not neutered, there is no information about this and the picture don't give us a clue. However, what we can see is that both cats are extremally fat, so I guess that the best explanation of the weight of Jaipur is no other thing that obesity.
About the wild tigers, of course that there are not tigers of that size in the woods, that will be imposible, nor even the giant Ngandong tiger (Panthera tigris soloensis) or the American "lion" (Panthera atrox) reached that huge body mass. If we use Bengal tigers as surrogates for the Amur ones, a healty average male in a proper habitat with good prey base, would weight 200-220 kg, with dominant males reaching 230-250 kg in the best cases. Animals of 280-320 kg are just very exceptional cases and only the most powerfull animals could reach this sizes.