This page may not contain information or history, as there are many items in Torn, and not all have a unique backstory.
Sierra Cosworth #511
This king of the rally world is still a pin-up for most boy racers. It will out-manoeuvre most cars in its class with its sheer mechanical grip and no electronic trickery. The low horsepower, however, does affect this car's acceleration to top speed.
Sierra Cosworth is a Car item that can only be acquired through Grand Theft Auto crimes. It can be sold to (but not purchased at) the Torn Docks.
The Sierra Cosworth can only be obtained through the "Hijack a Car" Grand Theft Auto crime. It is obtained about 1% of the time (or roughly one time for every 100 successes) from "Hijack a Car." 
The Sierra Cosworth cannot be found through city finds but can be traded between players.