81-71: I am the 81-71 from the Prague Metro, ask or ride on any Metro line you want! (A,B,C) Say hello to my two younger brothers 81-71M and Siemens M1 Siemens M1: Haha im faster than youuu! 81-71M: OH SHUT UP I GO 90 KM/H EČS: 81-71M actually goes 90 81-71M: Told you.