There have been seven noted versions of the WRX dating back from Subaru’s original World Rally Cross staging vehicles. Subaru adopted the name “WRX” to stand for “World Rally eXperimental” as all WRX versions (1992 to present) feature rally inspired technology, including all wheel drive, stiffened suspensions and turbocharged four cylinder engines. The STi versions were marketed with consecutive numbers. Another way to determine the version of a WRX was to look at the chassis code. All WRX sold between 1992 and 2000 have the beginning chassis code of GC8 2/4 door sedan or GF8 hatchback; this is followed by a letter from A to G. Coupe versions share the “GC” code with sedans, except in the US, where they have a separate chassis code of “GM”.
In 1994, Subaru introduced Subaru Tecnica International (STi badged) versions of the WRX in Japan. These models were upgraded from the standard WRX in many categories, including blueprinted performance-tuned engines, transmissions, and suspensions. The STi versions of the WRX were immensely successful in rallies and popular among street racers but were only sold in the Japanese market. Compared to the WRX, the STi had mostly mechanical modifications. (STi prepped Subaru rally cars since 1988 including the Legacy RS, the WRX STi Version was just the first car with an actual STi badge, though with handcrafted tuning)
- GC8A (11/1992-9/1993)
The WRX debuted in November 1992 with 240 PS (176.5 kW; 236.7 hp). The center differential was a viscous coupling type, the rear limited slip differential was a viscous type. The WRX Type RA is a stripped-down version of the WRX that was available in the Japanese market for people to purchase for motorsports. Targeted for race and rally, the RA versions were generally lighter in weight; featuring reduced soundproofing, manual windows, car horn delete, no air conditioning, no anti-lock brakes, and added racing features such as more robust engines, 5th injection, intercooler water spray and shorter gearing. The WRX Type RA uses a closer ratio gearbox and a three-spoke leather steering wheel from Nardi. Close ratio transmission is anticipated race use, the gap between each gear is brought closer together and a specific close ratio transmission is used. The standard WRX with chassis code between GC8-(000000 to 005000) is picked by workers from the production line according to race teams orders and converted to the ra model.
In Europe, the WRX was introduced as the Impreza GT, and as the Impreza Turbo 2000 (UK). It came with 208 hp (155 kW; 211 PS).