2004 Subaru Impreza WR1

Subaru has unveiled a special edition Impreza WRX STi to celebrate Petter Solberg winning the Driver’s Title in the 2003 World Rally Championship. On sale in the spring and limited to 500 units, the WR1, as it will be called, will feature a power upgrade to around 320 HP plus a host of technical and visual upgrades.

For example, the Impreza WR1 will feature a driver’s control centre-differential (DCCD) via a switch mounted next to the handbrake. It means the torque distribution between front and rear wheels can be manually selected. This allows the choice, for example, between a sharper cornering turn-in or more stable straight-line running. The system defaults to automatic mode whenever the ignition is restarted.

Externally, the new WR1 will be instantly recognisable thanks to its new Ice Blue Metallic paint plus driving lamps and a stainless steel mesh grille. Also new for the WR1 are special, Prodrive-developed uprated springs and bump-stops with a 25 mm lower ride-height.Other handling-enhancing features include 18 ins diameter P-FF7 (Prodrive Flow Forming seven-spoke) alloy wheels with Pirelli PZero tyres.

Interior changes include anthracite instead of blue suede-effect seats, a special gear knob, imaged carpet mats and a numbered tax disc holder.

Shared features with all Impreza WRX STi’s range from a six-speed gearbox to Brembo brakes and front and rear Suretrac differentials. WR1’s extra power and torque are achieved thanks to a revised engine control unit (ECU), high-flow catalyst and sports silencer.

Story by Subaru Limited, Edited by Supercars.net

In Detail

submitted by	Richard Owen
price $	$ 30 000 GBP
engine	Turbocharged Flat-4
position	Front
aspiration	Turbocharged
valvetrain	DOHC, 4 Valves per Cyl w/AVCS Variable Valve Timing
fuel feed	Electronic Injection
displacement	2457 cc / 149.9 in³
bore	99.5 mm / 3.92 in
stroke	79 mm / 3.11 in
compression	8.2:1
power	238.6 kw / 320 bhp @ 5800 rpm
specific output	130.24 bhp per litre
bhp/weight	216.22 bhp per tonne
torque	420 nm / 309.8 ft lbs @ 4000 rpm
redline	7000
body / frame	Unit Steel w/Aluminum Hood
driven wheels	4WD w/Driver Controlled Center Differential, SureTrac Front LSD,
front tires	225/45R17 Bridgestone Potenza RE070
rear tires	225/45R17 Bridgestone Potenza RE070
front brakes	Brembro Vented Discs w/4-Piston Calipers, EBD, ABS
f brake size	x 323 mm / x 12.7 in
rear brakes	Brembro Vented Discs w/2-Piston Calipers, EBD, ABS
r brake size	x 312 mm / x 12.3 in
front wheels	F 43.2 x 19.0 cm / 17.0 x 7.5 in
rear wheels	R 43.2 x 19.0 cm / 17 x 7.5 in
steering	Rack & Pinion w/Variable Assist
f suspension	MacPherson Struts w/Lower L-Arms, Coil Springs, Tube Shocks, 20mm Anti-Roll Bar
r suspension	MacPherson Struts w/Lower L-Arms, Coil Springs, Tube Shocks, 20mm Anti-Roll Bar
curb weight	1480 kg / 3263 lbs
wheelbase	2540 mm / 100 in
front track	1491 mm / 58.7 in
rear track	1486 mm / 58.5 in
length	4415 mm / 173.8 in
width	1740 mm / 68.5 in
height	1405 mm / 55.3 in
transmission	6-Speed Manual
gear ratios	3.636:1, 2.375:1, 1.761:1, 1.346:1, 0.971:1, 0.756:1, :1
final drive	3.90:1
top speed	~249.4 kph / 155.0 mph
0 – 60 mph	~4.25 seconds
0 – 100 mph	~10.67 seconds
0 – 1/4 mile	~12.8 seconds