Sunstreaker knows to the core of his spark that he is better than any other Autobot, and he makes sure everyone else knows it, too. His sociopathic tendencies, combined with his incredible vanity and arrogance, usually result in tension between himself and the other Autobots. He is generally unwilling to help those who are having trouble keeping up, and is quite audible when it comes to complaining about the shortcomings of everyone else. The only Autobot he truly gets along with is his twin brother, Sideswipe, and even that can seem strained at times.
Sunstreaker is the more ruthless and superior combatant of the two brothers. The main reason Optimus Prime keeps him around is most likely Sunstreaker's effectiveness in the battlefield. Ruthless and skilled in all forms of combat, there is not much Sunstreaker cannot handle. As a front-line warrior, Sunstreaker is a great asset for the Autobot army. If a rather scary one.
The main visual differences between the two Lamborghini transformers is that Sunstreaker is yellow, while Sideswipe is red, and that Sunstreaker has a modified engine protruding from his hood in vehicle mode, and his back in robot mode. He is apparently a master of a form of combat known as "jet judo".
At some point, Sunstreaker finds a straggler of an insecticon hoard. He trains it, and names him "Bob"
Originally created for the toy line of Transformers, Sunstreaker made his first appearance in the Transformers Miniseries in 1984. This was soon thereafter followed by a monthly series of the same name