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"No-Compromise" 2004 Impreza WRX STi

Subaru of America, Inc. introduced the long-awaited 2004 Impreza WRX STi, an ultra high-performance all-wheel drive sedan, at the North American International Auto Show. Based on the critically acclaimed Subaru Impreza WRX, Impreza WRX STi is completely re-engineered to provide world-class sports car levels of acceleration, handling and braking performance. Impreza WRX STi will serve as the performance flagship of the Subaru line when it arrives in dealerships this summer and will earn distinction as the most powerful Subaru ever offered for sale in North America.

The Impreza WRX STi draws motorsports technology directly from Subaru expertise in World Rally Championship (WRC) competition, and is designed to appeal to the serious driving enthusiast. Impreza WRX STi is powered by a turbocharged and intercooled 2.5-liter DOHC boxer engine producing 300 horsepower @ 6,000 rpm and 300 lb.-ft. of peak torque @ 4,000 rpm, teamed exclusively to a 6-speed manual transmission. Power is transferred to all four wheels via a sophisticated Subaru All-Wheel Drive system designed to optimize performance in all conditions.

Introducing Subaru Tecnica International (STI)

STI stands for Subaru Tecnica International, the high-performance and motorsports subsidiary of Fuji Heavy Industries Ltd. Subaru, which offers the only exclusively All-Wheel Drive line of passenger cars and crossover-type vehicles in the United States, has been proving the performance and durability of its All-Wheel Drive technology in World Rally Championship competition since 1989.

Until now, STi-badged Subaru vehicles had been available only in select world markets. However, the success of the WRX in the U.S. prompted strong (and vocal) demand from American consumers for an even more extreme-performance version of this car.

As a result, the U.S.-market Impreza WRX STi gives up nothing compared to models offered in Europe, Japan and other markets and in some ways offers more performance. For example, the 2.5-liter turbocharged powerplant is the largest displacement engine ever installed in a WRX STi model and is exclusive to the North American market. This unique engine also provides strong torque characteristics at both low and high rpm.

Rally Tested, Road Ready

The Impreza WRX STi benefits from the redesigned front and rear styling of the 2004 Impreza line. The expressive new design is the result of close consultation with Subaru STi engineers and the Subaru World Rally Team to improve air resistance, optimize lift force balance, maximize engine cooling and provide Impreza models with a bolder, more dynamic appearance. In its exterior design, Impreza WRX STi leaves no doubts about its performance potential -- a look that is equally functional. The enlarged hood scoop in the aluminum hood feeds outside air to the intercooler that is significantly larger than the unit found on Impreza WRX. A completely functional dual element rear spoiler -- which appears to be borrowed directly from the Subaru World Rally Car -- helps reduce lift and improve stability at high speed. Airflow is also managed via front side spoilers on the front bumper and STi side ground effects. The front fascia features four high-intensity discharge (HID) headlamps with smoke tinted lenses and distinctive STi fog light insert covers for a no-nonsense look. Large diameter Brembo® brakes are clearly visible between the spokes of the 17-inch lightweight aluminum- alloy BBS® wheels.

The 2.5-liter horizontally opposed ("boxer") four-cylinder engine is based on a specially reinforced "semi-closed deck" engine block with forged aluminum alloy pistons, forged high-carbon steel connecting rods and sodium-filled exhaust valves. This advanced powerplant incorporates Subaru AVCS (Active Valve Control System) variable valve timing technology to optimize the engine’s volumetric efficiency throughout the rev band. It is the first application of this technology on a Subaru in North America. The large capacity intercooler includes a manually operated water spray feature to provide additional cooling.

Driver-Adjustable All-Wheel Drive

WRX STi is equipped with the brand’s most performance-directed All-Wheel Drive system with DCCD (Driver Control Center Differential). In automatic mode, the computer varies the front/rear torque split automatically depending on driving conditions and driver input. In manual mode, the DCCD system allows the driver to vary the front-to-rear torque distribution for different driving conditions.

Using a small control wheel on the car’s center console, the driver can set the system to transfer as much as 65 percent of available torque to the rear wheels to increase handling agility.

Standard safety features include front seat head/chest side impact air bags (SRS), dual front airbags and three-point seatbelts. Front seat belts include electrically triggered pre-tensioners and force limiters. All 2004 Impreza models receive collapsible pedal controls that "break away" during a frontal impact to help reduce foot injuries.

 


Technical Specifications:
Engine
Type: Flat-4, Turbocharged
Displacement cu in (cc): 150 (2457)
Power bhp (kW) at RPM: 300(221) / 6000
Torque lb-ft (Nm) at RPM: 300(407) / 4000
Redline at RPM: n.a.
Brakes & Tires
Brakes F/R: ABS, vented disc/disc
Tires F-R: 225/45 ZR17
Exterior Dimensions & Weight
Length × Width × Height in: 173.4 × 68.1 × 56.7
Weight lb (kg): 3298 (1497)
Performance
Acceleration 0-62 mph s: 4.8
Top Speed mph (km/h): n.a.
Fuel Economy EPA city/highway mpg (l/100 km): 18/24 (n.a.)

Base Price: 2005 Subaru Impreza WRX STi - $32,295 / 38,280 € (last update: 11/22/2004)

 

Gallery 2004 Impreza WRX STi

Gallery 1999 Impreza STi Electra One
impreza_electraone.jpg (27046 bytes) impreza_electraone-back.jpg (27906 bytes)

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