ChibiSF
Member
In about 6 months I will be graduating college and getting a job in the real world. I have been looking for new cars, and have always wanted a WRX, I figure now is my chance.
I am wondering for the 2000-2008 generation Imprezas, what are the differences between the WRX and the STi? Is there a noticeable difference stock to stock between the two models? I have always thought the STi was just a little fancier and ran more boost, is this true?
Thanks
I see you're from Ohio, which means it's the USDM Impreza WRX and STi which I will be comparing.
In 2000, there was no USDM WRX. The GD chassis had not been released for the American market, and the United States was lagging behind the rest of the world in terms of rally goodness. Thus in 2001, for the 2002 model year, Subaru gave the United States its first WRX. This first year model WRX, with its rounded headlights, is known in the community as the "Bug-Eye." This model featured the open-deck Subaru EJ205, sporting a TD04 turbo rated at 227 BHP, and a 5-speed manual gearbox. Unlike the rest of the world which got 4 piston / 2 piston brakes, the USDM WRX cut corners and came with 2 piston / 1 piston brakes. There were a few minor upgrades for the 2003 model year.
In 2004, Subaru gave the Impreza a new face, usually called the 'blob-eye,' and its first STi. The USDM STi featured upgraded 4 piston / 2 piston Brembo brakes, various upgraded aluminum suspension pieces, a six-speed manual gearbox, a stronger R180 rear differential, DCCD or Driver Controlled Center Differential, and of course, the semi-closed deck 2.5L EJ2507 with ACVS, and the VF39 turbo. It also came with 17" forged BBS wheels, and the ginormous boot spoiler.
In 2005, the STi really starts to differentiate from its WRX younger brother. The center differential gets upgraded to a helical unit, and the bolt pattern changes from 5 x 100 to 5 x 114.3. Exterior wise, the STi gets rear fender flares.
In 2006, the Impreza gets yet another facelift, commonly known as the 'hawk' eye. The WRX however, gets its own upgrade as well. Carried over from the STi are some aluminum suspension pieces. The WRX also gets a bump in displacement from the open deck 2.0L EJ205 to semi-closed deck EJ255 2.5L. The main difference between the 06/07 WRX motors and the STi motor is the heads. No AVCS for the WRX. Brakes are also upgraded to FHI 4 piston / 2 pistons units, though they're not as large as the Brembos on the STI. The WRX still retains however the small TD04 turbo, and the fragile 5-speed gearbox.
In 2007, the STI gets an upgraded turbo. It no longer uses the IHI VF39, but the IHI VF43, which has known to be more reliable. The six-speed also has revised longer gear rations for better fuel efficiency, though some prefer the short ratio gearbox from the 04-06 models.
I'm not too familiar with the new Imprezas, but the same applies. The STi gets a bigger turbo, bigger brakes, 6 speed, DCCD, and for the first time, a noticeable difference in the exterior.
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