1. No.
2. No
3. Sti is better, hence why it costs more
4. Look up pictures of both, you can see the differences.
5. The shape of the interior is the same, the carpet/seats/steering wheel/switches, etc. all differ.

 

so is there a better turbo or more boost or what? and also in the body it really doesnt seem diffrent to me other than wings.

 

You can use the search feature or google to help get some of your information. This link is a good starting point
2007 Subaru Impreza WRX, STI, STI Limited specification, option and price page

 

STI has - larger brakes, DCCD, much stronger transmission (6 speed vs 5 speed on WRX), stiffer more track oriented suspension, HID lights (I believe the premium version of the WRX comes with these but not base model), forged wheels (they are a very lightweight forged BBS wheel, which is nice), and a much more powerful output (I'm strictly talking about the 2007's for which you asked - and not getting into painful detail why, but we can if you want more info). The interior is much nicer with better bolstered seats (especially compared to the TR WRX, or base version).

If you are looking to keep the car that you acquire stock, I would highly recommend going with the Sti over the Wrx. The WRX could be "made" into what you are looking for, but would require a lot of money to get up to the track performance of an STI. You will want to search very hard though to make sure you find a specimen that has not been beaten into the ground. If you find anything you want us to check out just post up some links and we would be happy to give you our thoughts.

Good luck!

 

STI has - larger brakes, DCCD, much stronger transmission (6 speed vs 5 speed on WRX), stiffer more track oriented suspension, HID lights (I believe the premium version of the WRX comes with these but not base model), larger wheels (really just to get over the larger brakes, but they are a very lightweight forged BBS wheel, which is nice), and a much more powerful output (I'm strictly talking about the 2007's for which you asked - and not getting into painful detail why, but we can if you want more info). The interior is much nicer with better bolstered seats (especially compared to the TR WRX, or base version).

If you are looking to keep the car that you acquire stock, I would highly recommend going with the Sti over the Wrx. The WRX could be "made" into what you are looking for, but would require a lot of money to get up to the track performance of an STI. You will want to search very hard though to make sure you find a specimen that has not been beaten into the ground. If you find anything you want us to check out just post up some links and we would be happy to give you our thoughts.

Good luck!

difference in power, why is that? is the engine the same just more boost or something than the turbo WRX? cause im willing to drop a couple grand if i were to get a WRX rather than an STi such as brakes, coilovers, seats, wing, steering, and turbo.

i just like the thought of a stock looking wrx with the quality of an STi in power and performance for racing and things, more of a sleeper kind of deal.

 

More boost does not equal better in every situation. The turbo is different, boost is different, pistons are different compression is probably different drive line are completely different, suspension, brakes, on and on and on.

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They're completely different cars. Plain and simple.

 

engine is different 2.0 vs. 2.5. Certainly if you have the money and want the power and benefits of the STI (why wouldn't you) then go for the STI. Plus if you get the STI you can get pink badges!

 

In 2007 both WRX and STI were a 2.5.

so is there a better turbo or more boost or what? and also in the body it really doesnt seem diffrent to me other than wings.

Keep in mind I am talking about hawk eye 2007 models here. Since we are only talking engine I will skip over the other benefits the STI offers, which for track, are really what make the STI shine...But engine wise, the STI has a water sprayed intercooler, which provides enhanced cooling capabilities. The STI comes with a reinforced semi-closed deck alloy block, forged high carbon steel connecting rods, resin composite intake manifold, and is carrying a different mapping set up. The WRX runs at 11.6PSI on the TD04L-13T turbo vs the STI's 14.5 PSI on the VF43 turbo.

 

The engines are virtually identical with a much smaller snail in the WRX (I'm still talking solely about the 2007). The suspension, transmission, and brakes alone account for the price difference.

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Since this is the topic here. Isn't there a piston and compression difference? I was reading about ringlands failures a while back and came across a post somewhere showing a wrx piston and a STI piston and the dome was slightly different. Is that only later?

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Heads and pistons are different.

There is no tie to Ringland failures.

 

Does this year STi have a nitride crank whereas the WRX doesn't?

 

I think that was 2008, but I could be wrong.

2009 WRX gained the nitrided crank mid-cycle.

 

if you plan to track the car go sti the whole drivetrain is stronger and more capable than the wrx. most people who race a wrx end up doing a full sti swap in the long run you pay more.

EJ257 vs EJ255 facts with pictures - NASIOC

2007 Subaru Impreza WRX, STI, STI Limited specification, option and price page