An average adult male Siberian outweighs an average adult male lion by around 45.5 kg(Brakefield, T. (1993). Big Cats: Kingdom of Might. Voyageur Press. ISBN 0-89658-329-5)
Today's wild Siberian tigers are smaller than Bengal tigers. Their reduced weight as compared to historical Siberian tigers may be due to a combination of causes: when captured, they were usually sick or injured and involved in a conflict situation with people.