2006 Subaru Impreza WRX STi


2006 Subaru Impreza WRX STi

2006 Subaru Impreza WRX STi

Subaru has introduced a restyled and re-powered Impreza model line for 2006, also adding three new WRX models, more safety features, and a revised Symmetrical All-Wheel Drive system in the 300-horsepower WRX STI.

The new Impreza shows a drastically different design approach, one which is probably motivated by Subaru’s new designer, Andreas Zapatinas of ex-Alfa Romeo fame. One particular area of interest is the front end. It features a controversial three part grill, a design we first saw from Subaru on their 2003 Subaru B11S Concept. Whether or not the new face and hood-top character lines gel with the rest of the car remains for the viewer to decide. In either case, Subaru have really upped the ante against the very evolutionary Mitsubishi Lancer IX.

The 300-horsepower Impreza WRX STI gains a further edge in all-wheel drive performance for 2006. The power distribution ratio in its advanced Driver Controlled Center Differential (DCCD) version of Symmetrical All-Wheel Drive has been changed from 35:65 to 41:59 and uses a new mechanical limited slip center differential in place of the previous hydraulically controlled unit. The addition of a steering sensor to the differential’s control inputs further enhances torque transfer and overall performance of the AWD system.

The WRX STI accents the Impreza re-style with new design features of its own. A new roof vane spoiler, as used on the Impreza WRC rally car, contributes to stability at track speeds. The new rear underbody diffuser and new side sill spoiler design ensure the WRX STI will turn heads while cheating the wind. The lower-profile hood scoop from the standard WRX aids forward visibility but maintains airflow to the intercooler due to the improved aerodynamics of the redesigned front-end. The WRX STI also gains daytime running lights (DRL).

In Detail

submitted by Richard Owen
price $ $32 195 USD
engine Boxer-4
aspiration High-Boost, IHI Turbochargers
valvetrain DOHC, 4 Valves per Cyl w/AVCS VVT
fuel feed Multipoint Fuel 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 223.7 kw / 300 bhp @ 6000 rpm
specific output 122.1 bhp per litre
bhp/weight 197.37 bhp per tonne
torque 406.75 nm / 300 ft lbs @ 4000 rpm
redline 7000
body / frame Unit Steel
driven wheels AWD w/Driver Control Center Diff (DCCD), Front and Rear LSD
wheel type BBS Forged Alloys
front tires 225/45ZR17 Bridgestone Potenza RE070
rear tires 225/45ZR17 Bridgestone Potenza RE070
front brakes Discs w/ABS, EBD
f brake size x 323 mm / x 12.7 in
rear brakes Discs w/ABS, EBD
r brake size x 312 mm / x 12.3 in
front wheels F 43.2 x 20.3 cm / 17 x 8 in
rear wheels R 43.2 x 20.3 cm / 17 x 8 in
steering Quick Ratio Rack & Pinion
f suspension MacPherson Struts w/Lower L Arms
r suspension MacPherson Struts w/Trailing Arms
curb weight 1520 kg / 3351 lbs
wheelbase 2540 mm / 100 in
front track 1491 mm / 58.7 in
rear track 1496 mm / 58.9 in
length 4465 mm / 175.8 in
width 1740 mm / 68.5 in
height 56.3 mm / Not Available 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 155:1
0 – 60 mph ~5.1 seconds
0 – 100 mph ~13.8 seconds
0 – 1/4 mile ~13.5 seconds