On sight, one could logically deduce that TIE Avengers were direct descendants of the TIE Fighter and TIE Advanced x1 starfighters. TIE Avengers shared many commonalities with the TIE Advanced x1; notably bent solar arrays, flattened and extended fuselage, and non-standard wing pylons in contrast to other TIE series fighters.
Similar to its older cousin, the TIE Interceptor, the Avenger featured the intimidating pointed solar arrays, not only in front, but also in the rear.
The Avenger's hull assembly was elliptical in shape, coinciding with overall smoother bodylines, contrasting those of its spherical TIE relatives, and the succeeding TIE Defender returned to the traditional spherical cockpit. Weapons
The TIE Avenger's primary weapon system was four Sienar Fleet Systems L-s9.3 laser cannons. These laser cannons were initially deployed on the TIE Interceptor, and later incorporated into the TIE/D Defender. These cannons were also more powerful than those of the standard TIE Fighter, capable of destroying an asteroid in a single burst. The Avenger's cannons could be fired in single, dual, or linked modes depending on the pilot's preference.
Warhead launchers were another weapon system that TIE Avengers took to the battlefield. SFS M-g-2 general-purpose warhead launchers formed the Avenger's secondary weapon system, possessing a magazine capacity of four concussion missiles each; however, they could also be loaded with proton torpedoes, heavy rockets, and space bombs. This standard feature was yet another advancement against the older TIE fighters, and the beginning of a major shift in Imperial doctrine leaning towards quality over quantity.
The TIE Avenger was powered by the SFS I-s3a solar ionization reactor and featured the new SFS P-sx7.4 ion engines. This new propulsion system, rated at one hundred and forty-five MGLT, pushed the Avenger faster than any previous TIE starfighter. The Avenger was also more nimble than the TIE Interceptor and the RZ-1 A-wing interceptor, with a maneuverability rating of one hundred and four DPF. These factors were a major contributor in TIE Avenger's success over the Rebel Alliance's fighters.
The TIE Advanced x1 pioneering the inclusion of a hyperdrive but it suffered from reduced maneuverable compared to the standard TIE Fighter. For the succeeding TIE Avenger, a major obstacle was overcome when Admiral Zaarin discovered a partner in the Habeen, who achieved a breakthrough in making a new hyperdrive model that could be small and reliable enough, eliminating the disadvantages of hyperdrive inclusion. The final TIE Advanced prototype far exceeded expectations by including a hyperdrive, shields, and a general purpose warhead launcher, all while surpassing the TIE Fighter's trademark speed and agility.
- Credit to Wookieepedia for the above information