Subaru Impreza and Impreza WRX STI History / Evolution (1992 - 2019)

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The Subaru Impreza is a compact family car that has been manufactured since 1992 by Subaru, introduced as a replacement for the Leone, with the predecessor's EA series engines replaced by the new EJ series.
Now in its fifth generation, Subaru has offered four-door sedan and five-door body variants since 1992; the firm also offered a coupe from 1995 until 2001, and a 5-door wagon from the Impreza's introduction in the form of a hatchback. Mainstream versions have received "boxer" flat-four engines ranging from 1.5- to 2.5-liters, with the performance-oriented Impreza WRX and WRX STI models uprated with the addition of turbochargers. Since the third generation series, some markets have adopted the abbreviated Subaru WRX name for these high-performance variants. The first three generations of Impreza in North America were also available with an off-road appearance package called the Outback Sport. For the fourth generation, this appearance package was renamed the XV (Crosstrek in North America), and, unlike the Outback Sport (which was exclusive to the North American market), is sold internationally.
The Impreza (also Impreza WRX and Impreza WRX STI) is a major rival to the Mitsubishi Lancer (and Mitsubishi Lancer Evolution).
Subaru has offered both front- and all-wheel drive layouts for the Impreza.
Announced on 22 October 1992, the Impreza was released in Japan in November and offered in either front-wheel drive (FWD) or all-wheel drive (AWD) versions and as a four-door sedan or five-door hatchback/wagon (Touring).
In 1994, Subaru introduced Subaru Tecnica International (STI) 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.
To celebrate the return of British driver Richard Burns to the rally team, a limited edition of 444 WRX "RB5" models in gray were created in 1999 for the UK. The basic model had little more than cosmetic differences, but most had the WR Sport Performance Pack, an option consisting of a new ECU and exhaust for 240 PS (177 kW; 237 hp) and 350 N⋅m (258 lb⋅ft) torque. There was also an optional Prodrive suspension pack.
Subaru introduced the "New Age" Impreza to Japan in August 2000.
Naturally aspirated flat-four (boxer) engines comprised the 1.5-liter EJ15, the 1.6-liter EJ16, the 2.0-liter EJ20, and the 2.5-liter EJ25. Turbocharged versions of the 2.0- and 2.5-liter engines were offered in the WRX and WRX STI models. STI models featured a more powerful 2.0-liter (2.5-liter outside of the Japanese market) turbocharged engine. WRX models featured a 2.0-liter turbocharged boxer engine until 2005, after which they switched to the 2.5-liter turbocharged engine.
Subaru revealed the third generation Impreza at the New York Auto Show on 2 April 2007—both the standard naturally aspirated Impreza and turbocharged WRX versions were revealed.
Flat-four gasoline engines in the naturally aspirated tune comprised a 1.5-liter EL15 producing 80 kW (107 hp), the 2.0-liter EJ20 with 110 kW (148 hp) and 196 N⋅m (145 lb⋅ft), and the 2.5-liter EJ25 with 127 kW (170 hp). Turbocharged versions of the two latter engines were fitted to the WRX and WRX STI versions as discussed later. Subaru introduced a flat-four diesel engine, designated EE20 at the 2008 Paris Motor Show. Sales began in several European countries from early 2009, with the 2.0-liter turbo diesel engine of 112 kW (150 hp). Two models are available as of July 2009, 2.0 TD and 2.0 TD Sport.
Four-door sedan or five-door hatchback versions of the fourth-generation Impreza were unveiled in 2011 at the New York International Auto Show.
Subaru unveiled the fifth generation 2017 model year Impreza sedan and hatchback at the New York International Auto Show in March 2016.
Powering the new Subaru Impreza is a revised version of the FB20 2.0 litre direct-injection boxer-four. Subaru's Lineartronic CVT was also improved with enhanced ratio coverage, and a 5-speed manual transmission continues to be available. The changes made to the Impreza's 2.0L engine are supposed to offer slightly improved acceleration and flexibility of power delivery. Although the engine is 152 hp, some auto reviewers feel that the new Impreza continues to fall short in power when compared to competitors from other brands. Some competing compact sedans such as the Volkswagen Jetta, Honda Civic, and Hyundai Elantra are sold with optional engines offering 200 hp or more.
Uploaded on Jan 13, 2019 at 09:01 AM
Category: Science and Technology

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