LOOKING BACK – 2002 Subaru Impreza WRX STi – Next Car Pty Ltd – updated 30th June, 2010

14 May 2015 | Author: | Comments Off on LOOKING BACK – 2002 Subaru Impreza WRX STi – Next Car Pty Ltd – updated 30th June, 2010

At $55,130, the Impreza WRX STi featured a specification list combined scintillating performance that was at the price.

The sophisticated technology drew directly on engineering gained in Subaru’s All-Wheel World Rally Championship producing a car with outstanding handling and ride.

With a km/h time of just seconds, the Impreza WRX STi’s is a technological marvel which great interest amongst car enthusiasts.

While the Impreza WRX STi was previously available in limited it became a permanent part of the range.

The impressive engineering included:

Dual overhead cam 2.0 turbocharged horizontally opposed engine with Active Control System

Six speed Drive close ratio transmission

Front and rear Limited Slip Differentials

performance sports suspension


Mr Nick Senior, Manager, Subaru Australia, (in December 2001): “Impreza WRX STi is the of Subaru’s high performance It’s not only quick, got a tremendous specification list and the intrinsic engineering quality and and passive safety that has the entire Impreza range the in its class. This is a delightful car to with great balance, performance and safety. It is further that Subaru is a performance car

Mr Senior said the Subaru WRX STi offered performance previously available on cars costing thousands of dollars more, it was also user-friendly and included such as cruise control.

At the Subaru anticipated selling 50 WRX STi a month throughout Australia.

features at a glance


Aluminium bonnet


AM/FM radio with in-dash stacker, cassette and six

Active Valve Control

Brembo brakes 326 mm 4-pot 316 mm 2-pot rear, vacuum

Clear free-form quad integrated with indicators

keypad alarm security

Cruise control

Dual airbags

Dual trip

Grille unique to STi

Instrument with large centre STi – driver adjustable rpm warning


Larger bonnet (than Impreza WRX)

centre console control with dial controls

leather steering wheel

temperature display

Rear centre three-point seat belt. All rear belts A/ELR


Red stitching on leather steering gear knob and handbrake

Remote central locking, with hazard lights for recognition

Semi automatic air

Six-speed close ratio transmission

Space saver wheel

Sports ABS with EBD


Sports interior, bucket seats with STi and blue inserts

STi badging on front doors, boot and bumper

STi gearshift surround

STi diameter exhaust

STi logo on

Suretrac front and rear Slip Differentials

Variable windscreen wiper control

integrated radio antenna

2.0 turbocharged horizontally opposed engine

17-inch five-spoke alloy wheels unique to Sti

The Impreza WRX STi was available in:

WR Blue

Blue Black mica


Premium Silver


Subaru Impreza WRX STi’s performance came from a 2.0 litre turbocharged horizontally quad-cam 16-valve Boxer

It produced 195 kW of power at 6,000 rpm and 343 Nm of at 4,000 rpm.

The Active Valve Control electronically adjusted the intake timing through a range of 35 degrees. This produced power and torque while fuel consumption and emissions.

The strength engine block

Semi closed deck providing reinforcement around tops, while maintaining the advantage of a full open design.

Forged pistons, for durability and strength under thermal loads.

Connecting rod drew on new design and manufacturing introduced in Subaru’s highly H6-3.0 engine, used in the H6.

Hollow inlet valves valve train inertia, the valves to follow the camshaft even at high engine

Sodium-filled exhaust valves heat from the exhaust head.

An engine oil cooler was between the oil filter and engine

A large diameter STi exhaust completes the powerful engine

Turbocharger and intercooler

The IHI turbocharger an A/R ratio of 15 which, in conjunction the Active Valve Control provided the optimum in volumetric (The A/R ratio of the turbocharger the characteristics of exhaust gas pressure ‘A’ represents the smallest area of the of the turbine housing and ‘R’ represents the from the centre of the turbine to the centre of the turbine-housing inlet).

A 15 mm-taller bonnet scoop air into the intercooler, which is 39 per larger than standard WRX.

This reduced any in the airflow. A driver-controlled water can be used to further lower air temperature under extreme for example when accelerating low speed, when airflow the intercooler is at a minimum.


The performance hydraulically operated had 930 kilogrammes of clamping force, positive power to the six-speed ratio transmission.


The constant mesh close transmission featured double mechanisms on first, third and gears, while second was equipped with a triple mechanism.

The synchronisers provide gear-shift performance.

The transmission has gears and bearings for added while a positive lubrication using a vehicle speed-driven oil increased durability.

The transmission Subaru’s well-known centre with viscous coupling, on all its manual transmission vehicles, to 50:50 front and rear split to the All-Wheel Drive

Front and rear Limited Differentials

Impreza WRX STi featured torque sensing Limited Differentials.

This self-contained mechanical system works engine load to transfer to the wheel with most

It had a large R180 rear compared to the R160 of the standard WRX.


The inverted KYB ensured outstanding sports and ride.

The set-up includes springs. The shock absorbers had rates matched to the spring while inverted struts, an integral part of the suspension provide high levels of strength.

This meant geometry was maintained even the hardest cornering, thus maximum tyre contact the road.


Internationally Brembo brakes and large front and rear discs excellent stopping characteristics.

The 326 mm front and 316 mm 2-pot rear are linked to the Sports Anti-lock System (ABS), which Electronic Brake-Force Distribution

EBD balanced brake force to better distribute it between and rear wheels.

Normally, because of a car’s distribution, rear brakes can easily lock. While a valve linked to a conventional system reduced the possibility of brake lock-up, it under-utilises braking capacity, especially in a vehicle.

However, Subaru’s EBD ensured optimum use of braking at the front and rear wheels.

when ABS operates on a rear it usually automatically regulated the force on the opposite rear to the same low level. This is to as “select low.”

However, Impreza WRX STi’s braking still further was Sports

This meant that cornering forces above a set are detected and rear ABS activates, the force of each rear is controlled independently, providing braking force.

Other features

Impreza WRX STi had a power oil cooler to maintain viscosity of steering fluid under operating conditions.

Subaru WRX STi also had an adjustable revolution that can be set by the driver. This as an automatic reminder to inform the of a preferred gear change to suit their individual style.

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