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 2007.10 : Subaru announced the release of the brand-new Impreza WRX STi
(GRB).
In 1994, the first-generation WRX STi model was developed by Subaru Tecnica
International (STI) who is Fuji Heavy Industries Ltd. subsidiary specialized
in motorsports activities, and Impreza WRX STi has been supported as a
high-performance car since then. The third-generation GRB Impreza WRX STi
features are including new 5 door design, the new engine, the multi-mode
DCCD (Driver's Control Center Differential), and multi-mode VDC (Vehicle
Dynamics Control). Moreover, the SI chassis (Subaru Intelligent Chassis)
has been developed for the WRX STi.
The Impreza WRX STi is powered by a twinscroll turbocharged EJ20 2.0liter
DOHC 16-valve Boxer engine with dual AVCS that makes 308PS (227kW). The
engine performance has been improved by changing the shape of the intake
and exhaust ports, by changing the shape of the turbocharger compressor,
by installing the TGV (tumble generated valve) in the intake manifold,
and by adopting a secondary air system. And electronically controlled throttle
which enables finely adjusted control has been adopted.
The Impreza WRX STi exterior design features wide and aerodynamics body
for the concept of "Pure Form for Driving". For the driving stability,
the wheelbase has been expanded by 85 mm, the front tread has been widened
by 40mm, and the rear tread has been widened by 45mm, than in its
predecessor. The engine placement has been lowered by 22mm (the front end
of the engine) and 10mm (diff center) for the improvement of stability.
The interior is finished in black and silver to highlight its streamlined
design. And, it is equipped with front bucket seats, Recaro seats (option),
a three-spoke leather wrapped steering wheel with the STI logo, red illumination
three meters, and a push start button.
The Impreza WRX STi has adopted SI-DRIVE (Subaru Intelligent Drive) that
the driver can select arbitrarily of three different modes ; Intelligent
mode, Sport mode, and Sport Sharp mode. The multi-mode DCCD enables the
driver to choose from different modes of control for the center differential.
And the Impreza WRX STi also have the multi-mode VDC that provides
three different modes ; Normal mode, Traction model, and Off mode.
And, the Impreza WRX STi is equipped with the strut-type front suspension
and the newly designed double-wishbone rear suspension, aluminum cast lower
arms, the stabilizer bar, the Brembo ventilated disc brake system, SuperSports
ABS with EBD, and Bridgestone RE050A (245/40R18) tires.
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