Subaru WRX vs Subaru STi

Note: this comparison is for WRX and STi models from 2015 through 2021. Subaru introduced an all-new 2022 WRX and announced that there would not be a 2022 STi. It could be a while before we see a new STi since Subaru is exploring electrified powertrains, and presumably one of those would take a few years to develop. Until then, we will continue to stock used STi models.

Planet's Executive summary:
With 578 horsepower between the two of them, you can't go wrong.  For under $30,000, you can drive the Subaru WRX, a turbocharged, all-wheel-drive performance car, respected the world over.  If you have approximately $10,000 more, you can buy the STi--a WRX on steroids.  For the extra money, you get a bigger engine with more power, an even more sophisticated suspension, and many other upgrades.

Which one should you buy?

What are the differences?

Subaru WRX

Subaru STi

Engines and Power
Both use intercooled, four cylinder, turbocharged Boxer engines with direct fuel injection and Subaru Dual Active Valve Control System.

2.0 liter
268 horsepower
258 lb.-ft torque

2.5 liter
310 horsepower
290 lb.-ft torque


Six Speed

Sport Lineartronic CVT with stepped manual and automatic shift modes controlled with steering wheel paddle switches.

Six Speed


0-60 Time and Top Speed

Manual: 5.2 Seconds
Automatic: 5.7 seconds
Top Speed: 155 mph

Manual: 4.8 seconds
Top Speed: 174 mph

Rear Spoiler
Subaru says the park bench on STi adds 3mph to top speed and increases stability at high speeds. STi can be ordered with the WRX lip spoiler.


Not Subtle

STi also gets huge Brembo brakes.
Driver Controlled Center Differential
Rally drivers will appreciate controlling their fore/aft torque.

not available, so no switch

Subaru Intelligent Drive (SI-DRIVE), a throttle management system, allows driver to choose from among three selectable modes: "Intelligent," "Sport" and "Sport Sharp."

Available only on CVTversion. Switch is steering wheel mounted (not shown on this six speed).

Standard. Switch found in center console with DCCD. See close-up picture above.


Double Wishbone lateral link with pillow-ball bushings

Strut-type with aluminum lower L-arm with pillow-ball joints

Double wishbone lateral link with pillow-ball bushings

Inverted strut, aluminum L-arm with pillow-ball joints


WRX starts around $28,000
See pricing and models.

STi starts at $38,000
See pricing and models.

Dynamic Brochures
Video, glossy photos, and spec listings worthy of an eye chart.



Subaru WRX Limited Photo Gallery.  Click to enlarge.


Subaru STi Limited Photo Gallery.  Click to enlarge.

Search our inventory below for your WRX or used STi:

Or learn more factory ordering your WRX here

Subaru WRX Limited Photo Gallery.  Click to enlarge.


Subaru STi Limited Photo Gallery.  Click to enlarge.


What is the difference between the Subaru WRX and the Subaru STI?  You'll find out when you visit Boston's favorite Mass dealer, Planet Subaru!

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