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.
For brute strength, though, I think an average, full-grown male Bengal Tiger can horizontally pull at most three tons of weight with his forelimbs, and a little over one ton with just his jaws. A gaur (2000-pound one), assuming it would pull in the mannerism that a draft horse or an ox would, can pull up to fifteen tons due to a greater muscle mass percentage than the ox and a larger size than the ox (a single ox weighing 1000-pounds can pull five tons). Also, I do think wild bovines are pound-for-pound stronger than their domestic counterparts, as with most wild animals and domesticated animals. The tiger uses his arms/jaws, and the gaur is holstered here.
If comparing pulling weight/body weight ratios between the two, it would compute this:
Tiger (jaws) = 5 - 5.2x body weight
Tiger (forelimbs) = 13.75 - 15x body weight
Gaur (holstered) = 15x body weight
Note how the tiger and the guar are similar in pound-for-pound horizontal pulling strength, but in different ways. As stated earlier, strength is difficult to assess, but I would easily give the edge to an equally-sized tiger.