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How fast is 854 kilometers per hour?

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It's about seven-tenths as fast as The Speed of Sound
In other words, 854 kilometers per hour is 0.692 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 1.45 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 343 m/s. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 5,390 kilometers per hour to 5,620 kilometers per hour in water, depending on its salinity.
It's about three-fifths as fast as a Bullet (Handgun)
In other words, 854 kilometers per hour is 0.618 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 1.62 times that amount.
(for .40 Smith & Wesson 135 grain Sierra JHP, VV 3N37 powder, Fed. 100 primer, Remington case) (muzzle velocity)
A 0.40 caliber Smith & Wesson bullet has a muzzle a velocity of 1,380 kph. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about two times as fast as a Peregrine Falcon
In other words, 854 kilometers per hour is 2.2 times the speed of a Peregrine Falcon, and the speed of a Peregrine Falcon is 0.455 times that amount.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 389 kph when diving. Falcons are sometimes sent to scare smaller birds away from airports to improve air traffic safety and were used in World War II to intercept carrier pigeons used by enemy forces.
It's about two-and-a-half times as fast as The CRH (train)
In other words, 854 kilometers per hour is 2.4 times the speed of The CRH (train), and the speed of The CRH (train) is 0.42 times that amount.
(a.k.a. Hexie Hao, 和谐号, a.k.a. 和諧號, a.k.a. Héxié Hào, a.k.a. "Harmony")
The CRH-3 train which runs on China's Beijing-Tianjin Intercity Railway are capable of speeds up to 350 kph. Theses train can make the 120 km (74 mi) journey from Beijing to Tianjin in about 30 minutes.
It's about two-and-a-half times as fast as a Porsche 911
In other words, 854 kilometers per hour is 2.6 times the speed of a Porsche 911, and the speed of a Porsche 911 is 0.385 times that amount.
(for Porsche 911 Type 997 GT2, 2007 model)
The Porsche 911 GT2 has a top speed of 329 kph. It takes just 7.4 seconds for the GT2 to accelerate to 161 kilometers per hour.
It's about two-and-a-half times as fast as an Arrow (archery)
In other words, 854 kilometers per hour is 2.646 times the speed of an Arrow (archery), and the speed of an Arrow (archery) is 0.3779 times that amount.
(250 g arrow fired from 60#/28" bow)
A 250 gram arrow will reach speeds of approximately 322.8 kph when fired from a 60-lb, 28-inch draw bow . Archeological evidence from the Ahrensburg valley near Hamburg, Germany indicates that arrows have been used since at least 11 to 12,000 years ago.
It's about two-and-a-half times as fast as a Lamborghini Gallardo
In other words, 854 kilometers per hour is 2.7 times the speed of a Lamborghini Gallardo, and the speed of a Lamborghini Gallardo is 0.37 times that amount.
(for Gallardo LP 550-2, a.k.a. Valentino Balboni, 2009 model)
The Lamborghini Gallardo LP550-2 model Gallardo has a top speed of 320 kph. The Gallardo can reach speeds of 100 kph in just 3.9 seconds.