05 or 06 sti (any difference in engine performance)?
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Joined: Mar 2007
Posts: 19
From: Socal/Norcal
Car Info: VIII
05 or 06 sti (any difference in engine performance)?
Hello, I have a noob question to ask. What's the different between an 05 and 06 performance wise, engine, turbo etc...My friend's going to buy a used one real soon and we just want to know if it's worth it to get an 06, thanks
Registered User
Joined: Aug 2006
Posts: 130
From: Minnesota
Car Info: 2006 Impreza WRX Sti/Hawkeye
i dont know but i drive a stock 06 sti and i always seem to beat the stock 04-05 sti's...just by my experience i dont know about others
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Joined: Apr 2006
Posts: 202
From: CA
Car Info: 06' Subaru IMPREZA WRX FP18g
its the differentials ratio are different. i heard is someting gotta do with the split XX/XX differential ratio, thats was making it faster!
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Posts: 1,952
From: Pleasanton, CA
Car Info: a prius, a miata, & 2 m3's
:sign0135:
So much misinformation on this thread... :character0074:
The facts: 04, 05 and 06 USDM STi's are all 2.5L Turbos (VF39).
The 07 STi changed to a VF43 with different gear ratios. I do not think the differential ratio changed from 06 to 07. :cook:
So much misinformation on this thread... :character0074:
The facts: 04, 05 and 06 USDM STi's are all 2.5L Turbos (VF39).
The 07 STi changed to a VF43 with different gear ratios. I do not think the differential ratio changed from 06 to 07. :cook:
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Joined: Nov 2006
Posts: 16
From: New jersey
Car Info: 06 WRX.
06 sti's are definately faster than 05's. My 06 wrx beat an 05 sti at the track with only stage one, that could be the driver, but I've heard the 06 is faster. but the 07 has been the best sti yet.
Not sure how that would help one be fastAr than the other tho...
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Joined: Feb 2006
Posts: 1,900
From: Baja Oregon
Car Info: '05 Impreza Outback Sport ~ "WTF! Two-Toned?"
It wouldn't... I have driven all (on a daily basis). Out of the box the '05-'07s run the same. HAWT!
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From: Rockin my 6th Suby in the 808 in the past decade!
Car Info: 01 Impreza RSTi, 08 Evo MR, and 13 XV
who cares which is faster. I would say barely 20% of all sti owners can handle all that power anyways. Hp numbers are nothing more than an extension of your *****. and for the record the 05's look better than the 06's PERIOD! 
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