It's about one-and-one-tenth times as heavy as a Car.
In other words, 277.5 stones is 1.067 times the weight of a Car, and the weight of a Car is 0.9372 times that amount.(for 2009 Ford Taurus; automatic transmission; curb weight)
A 2009 Ford Taurus weighs 260.1 stones. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 60.78 stones.
It's about four-fifths as heavy as a Rhinoceros.
In other words, 277.5 stones is 0.84 times the weight of a Rhinoceros, and the weight of a Rhinoceros is 1.2 times that amount.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 330 stones. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about seven-tenths as heavy as a Giraffe.
It's about two-thirds as heavy as The Tongue of a Blue Whale.
In other words, the weight of The Tongue of a Blue Whale is 1.5 times 277.5 stones.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 430 stones. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about half as heavy as a Hippopotamus.
In other words, 277.5 stones is 0.47 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 2.13 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 591 stones. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about two-and-a-half times as heavy as a Cow.
In other words, the weight of a Cow is 0.38 times 277.5 stones.(for Holstein, a.k.a. Holstein Friesian, a.k.a. Friesian, Bos primigenius) (adult, heifer)
A mature Holstein cow (the well-known black-and-white, spotted breed of cow) typically weighs 110 stones. President William Howard Taft (1909 - 1913) kept a Holstein cow named Pauline Wayne on the White House grounds — a gift from a Wisconsin senator and the source of the First Family's milk.
It's about three-and-a-half times as heavy as a Grizzly Bear.
In other words, 277.5 stones is 3.38 times the weight of a Grizzly Bear, and the weight of a Grizzly Bear is 0.296 times that amount.(a.k.a. brown bear, a.k.a. silver bear, Ursus arctos horribilis) (Adult, male, coastal area population average)
An adult, male grizzly bear from a coastal area (where food is plentiful) can weigh up to 82 stones. In spite of their tremendous size, grizzly bears can run at speeds of up to 55 kph (34 mph).