Whats the Difference Between the Two Models?

From the outside, both models seem very similar--minus a giant wing, a pink little badge and 
different wheels--and those are small details!

Under the Hood


WRX 2.0 Liter

STI 2.5 Liter

Head to Head Table Comparison

 Compare WRX STI
 Horse Power:
 268 hp @ 5600 rpm
 305 hp @ 6000 rpm
 Torque: 258 lb-ft @ 5200 rpm
 290 lb-ft @ 4000 rpm
 Bore and Stroke:
 86.0 x 86.00 mm
 99.5 x 79.0 mm
 Maximum Boost:
 15.9 psi
 14.7 psi
 Fuel: Direct Injection
 Sequential Multiport Injection
 Twin Scroll
 Single Scroll
 2.0 - Flat Four
 2.5 - Flat Four

The MSRP for the 2015 Subaru WRX starts at $26,295 for the base model and the 2015 WRX STI starts at $34,495.


Head-to-head, both cars look aggressive and ready for the road. The STI's extra cost adds in upgraded and revised track tuned suspension, Brembo® performance braking system and a Driver Controlled Center Differential (DCCD)* which allows the driver to add or take away power from the rear wheels.

The STI features a larger rear spoiler and LED Headlights (also available on the WRX Limited). Both models have rear LED taillights.

The 2015 Subaru WRX and STI have the same wheel base of 104.3 inches, a 3,267 lb curb weight and 70.7 inch width. The WRX comes with 17 x 8.0-inch spoke aluminum-alloy wheels.

The 2015 STI sits on 18 x 8.5-inch 5-split-spoke BBS® Aluminum-alloy wheels in a high-luster silver finish. These also come in gold on the STI Launch Edition. The 2015 STI also offers 18 x 8.5-inch 10-split-spoke aluminum-alloy wheels.

WRX STI Interior Comparison


2015 WRX

2015 STI

The interior design of the two vehicles is nearly identical, with the exception of trim and fine details.
Both cars have newly redesigned sport steering wheels, a plastic carbon fiber styled trim and a new in-dash display.

2015 WRX Sport Wheel

2015 STI Sport Wheel and Push Button Engine Start.
There is a small difference between the trim on the bottom.


Digital Boost Gauge on the WRX & WRX STI.

Both models feature a rear-view camera.

The 2015 WRX interior features sport-styled seating with red stitching, as seen in this Limited trim.

The 2015 STI has a stamped head rest with a red striped interior trim.


2015 WRX Shift Knob

2015 STI Red Trimmed Leather Shift Knob.

2015 WRX STI SI-Drive & DCCD

The 2015 Subaru WRX STI lets the driver choose from three modes of driving characteristics, with Subaru Intelligent Drive (SI-DRIVE) technology to suit your preferred taste in control. Put the power of Symmetrical All-Wheel Drive in your hand. The Driver-Controlled Center Differential (DCCD) works with the close-ratio 6-speed manual transmission, so you can adjust the amount of lock between the front and rear wheels, letting you match your vehicle's handling attitude to your own.

Make an Inquiry


  • Monday 09:00am - 08:00pm
  • Tuesday 09:00am - 08:00pm
  • Wednesday 09:00am - 08:00pm
  • Thursday 09:00am - 08:00pm
  • Friday 09:00am - 08:00pm
  • Saturday 09:00am - 07:00pm
  • Sunday Closed

Mark Miller Subaru Midtown

3535 S State St
Directions Salt Lake City, UT 84115

  • Sales: 801-268-3734
  • Service: 801-553-5250
  • Parts: 801-268-9613

2015 WRX STI Accessories

  2015 Subaru WRX SPT Exhaust: Order today!
2015 STI Short Throw Shifter - WRX - Order Today!
2015 WRX Sport Wheels
- $1,593.32

2015 WRX Illumination Kit

Carbon Fiber Trunk Trim

STI Under-Spoiler: Rear quarter

2015 STI Front Lip Spoiler

2015 STI Under Spoiler

2015 WRX STI Car Cover

Parts Request

Contact Information

Vehicle Information

What parts do you need?