okay, so say were are taking the biggest animals ever found of these two species and putting them in an arena face to face to the death. Adult White Rhinos usually weigh between 1800-3000 kg and have a shoulder height of 150-185 cm. The heaviest White Rhino ever recorded weighed 4500 kg! The largest wild Kodiak bear on record weighed over 2,500 pounds and was almost 14 feet tall on its hind legs. it's a tough one for me, but i say the kodiak grizzly.