STI Technology
As the performance flagship of Subaru, STI continues to lead the way in the development of world class, fun-to-drive performance technologies.
The unique combination of the Subaru Symmetrical All-Wheel Drive system and turbo-charged horizontally opposed Boxer Engine in the third generation Impreza WRX STI has been complemented by a number of exciting technologies designed to deliver superb performance and total driving control in even the most challenging of driving conditions.
With the World Rally Championship circuit as the testing ground of choice for the past 13 years, STI and the Subaru World Rally Team (SWRT) have been able to directly influence the design the New Generation Impreza WRX STI into the most refined and exhilarating driving machine developed yet.
Impreza WRX STI features a number of innovative technologies designed to maximise overall vehicle performance including handling, stability, safety, ride comfort and design quality.
That’s why every 2009 Impreza WRX STI comes with a 2.5 litre turbo-charged horizontally opposed Boxer engine producing 221 kW of power and 407 Nm of torque, a Driver Controlled Centre Differential (DCCD), Subaru Intelligent Drive (SI-Drive), Subaru Intelligent Chassis (SIC), multi-mode VDC stability control (VDC) and of course the legendary Subaru constant All Wheel Drive system - a performance package unmatched by any sports car under $100,000.
Some of the Advanced Technologies found in the new Impreza WRX STI:
Power Unit
2.5 Litre Horizontally Opposed 16-valve turbocharged Boxer with dual AVCS
New generation Impreza WRX STI features an enhanced 2.5 litre Horizontally Opposed 16-valve turbocharged Boxer Engine with a dual Active Valve Control System (AVCS), producing an impressive 221 kW of power and 407 Nm of torque.
Read more about STI's Power Unit
Drive Train
SI-DRIVE (Subaru Intelligent Drive)
SI-DRIVE enables the driver to choose three different engine map settings on the move. The 3 modes are:
Intelligent Mode (I) - Smooth, efficient economy driving;
Sport Mode (S) - All round performance;
Sport # Mode (S#) - Truly dynamic engine performance.
Read more about STI's Drive Train
Chassis
Front inverted strut suspension
An inverted strut suspension type has been featured on the new STI. On top of the improved stability performance yielded by the wider track and shorter overhangs, the road-holding ability of the tyres has been greatly improved by optimising the suspension geometry, including toe and camber angles, andstretching the suspension stroke.
Body Construction
STI advanced Ring-Shaped Reinforcement Body Structure
The new generation Impreza WRX STI uses an advanced Ring Shaped Reinforcement Body Structure, reinforcing each pillar with frames that circle around the body in a ring shape.
Read more about STI's Body Construction
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