It's about as fast as a Jet Fighter.
It's about seven-tenths as fast as a Bullet (Rifle).
In other words, 2 mach is 0.7250 times the speed of a Bullet (Rifle), and the speed of a Bullet (Rifle) is 1.380 times that amount.(5.56 x 45 mm, a.k.a. 5.56 NATO)
A 5.56 x 45 mm cartridge is fired at a velocity of 2.760 mach. As the NATO rifle cartridge, it is used by the military forces of more than thirty-one countries, including use in the M16 series, M4 Carbine, HK-416, and M249 Squad automatic weapons used by the United States armed forces.
It's about one-and-three-fourths times as fast as a Bullet (Handgun).
In other words, the speed of a Bullet (Handgun) is 0.5780 times 2 mach.(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 1.160 mach. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
It's about one-and-nine-tenths times as fast as The Speed of Sound.
In other words, 2 mach is 1.930 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.5180 times that amount.(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 1.03 mach. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 4.520 mach to 4.710 mach in water, depending on its salinity.
It's about six times as fast as a Peregrine Falcon.
In other words, 2 mach is 6.140 times the speed of a Peregrine Falcon, and the speed of a Peregrine Falcon is 0.1630 times that amount.(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 0.3260 mach 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 seven times as fast as The CRH (train).
In other words, 2 mach is 6.80 times the speed of The CRH (train), and the speed of The CRH (train) is 0.150 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 0.290 mach. Theses train can make the 120 km (74 mi) journey from Beijing to Tianjin in about 30 minutes.
It's about seven-and-a-half times as fast as a Porsche 911.