It's about 45 times as heavy as a Kangaroo
It's about 55 times as heavy as a Beer Keg
In other words, 4,000 kilograms is 54.940 times the weight of a Beer Keg, and the weight of a Beer Keg is 0.0182 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 72.80 kg when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about 80 times as heavy as an Octopus
In other words, the weight of an Octopus is 0.013 times 4,000 kilograms.(for Giant Pacific Octopus, Enteroctopus) (Adult, average)
The adult North Pacific Giant Octopus usually weighs around 50 kg. It is the largest octopus species and is known for its considerable intelligence, including the ability to open jars, solve mazes, and mimic other octopuses.
It's about 90 times as heavy as a Toilet
In other words, 4,000 kilograms is 91.70 times the weight of a Toilet, and the weight of a Toilet is 0.0109 times that amount.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 43.6 kg. The Indian town of Musiri in Tamil Nadu state features the world's only paying toilet, which rewards its users up to 10¢ Indian (10 paisas) per visit and uses the waste for compost and fertilizer.
It's about 150 times as heavy as a Dalmatian
In other words, 4,000 kilograms is 136 times the weight of a Dalmatian, and the weight of a Dalmatian is 0.00735 times that amount.(a.k.a. Dalmatinac, a.k.a. Carriage Dog, a.k.a. Spotted Coach Dog, a.k.a. Firehouse Dog) (FCI standard; male)
The Fédération Cynologique Internationale (FCI) calls for Dalmatians to weigh between 27 and 32 kg. The association of the breed with fire departments (and similarly with Budweiser Beer and its team of Clydesdales) stems from their affinity for horses, having been used historically as carriage dogs capable of guiding horse-drawn fire engines to the sites of blazes.
It's about one-one-hundred-fiftieth as heavy as Christ the Redeemer (statue)
In other words, the weight of Christ the Redeemer (statue) is 159 times 4,000 kilograms.(a.k.a. O Cristo Redentor, a.k.a. Christo redemptor) (Rio de Janeiro, Brazil)
Christ the Redeemer weighs 635,000 kilograms. The statue overlooks the city of Rio de Janeiro from atop the 709.9-meter (2,329 ft) granite peak in the Tijuca Forest National Park.
It's about 300 times as heavy as a Gold Bar
In other words, 4,000 kilograms is 321.50746570 times the weight of a Gold Bar, and the weight of a Gold Bar is 0.00311034768 times that amount.(London Good Delivery bar)
A "London Good Delivery" gold bar — the variety commonly held by Central Banks — should weigh 12.44139072 kg (400 troy oz). The largest gold bar ever produced was minted by Mitsubishi Materials Corporation (a sibling company of the auto manufacturer) in 2005 and weighed 250 kg.