Back in 2000, the MTA executives at the time were planning on ways to royally fuck over the MTA riders.
Eventually, after a massive mutual masturbation session, it was concluded that the best way to anally rape American taxpayers in the most efficient manner was to order a MASSIVE amount of shitty ass subway cars for the MTA executives to get high in on the weekends when the surplus subway car count rises because of the service cutbacks.
By 2010, all of the R160s were delivered, and notable epic and timeless subway cars such as the R40 Slants were retired.
In the New York City metropolitan area, the term "R160" generally refers to something horrible in quality and design.
Person 1: "Hey man so I heard you had your balls caught in a pencil sharpener that acted like a meat grinder."
Person 2: "Yeah that thing was a massive R160"
Person 1: "I have a Zune."
Person 2: "R160."