2015 WRX STI Even Quicker and More Playful – Buyers Guide, Trims, Specs

Quicker and more playful!? Yes sir – the new STI also looks far better equipped than ever before.

WRX gif 2015

The 2015 WRX STI debuted yesterday in Detroit – wearing a cool new style and packing benefits under every body panel.

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The key highlights are listed below from Subaru, but really come down to three items:

— All-new engine with more eager power delivery, 305 HP, and more SI-Drive modes

— ‘Remastered’ suspension tuning, 41-percent-stiffer chassis, and a much quicker steering rack

— Interior worthy of $35,000 performance car – with luxury features and tech that are all new to the STI

The new WRX STI looks like a phenomenal machine – with appealing styling to go with all that hilarious turbo performance.

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  • Remastered track-tuned suspension with 16% reduction in body roll

  • Multi-mode Vehicle Dynamics Control (VDC) with Active Torque Vectoring for more control in fast corners

  • Ultra-quick 13.0:1 steering ratio

  • Available lightweight forged aluminum BBS® wheels


  • 305-horsepower turbocharged

    SUBARU BOXER® engine

  • Subaru Symmetrical AWD with Driver-Controlled

    Center Differential (DCCD)

  • Brembo® performance braking system

  • SI-DRIVE performance management system

  • STI-exclusive rear spoiler for added downforce and improved high-speed stability

  • 41% more rigid unibody creates ideal platform for the best-handling STI ever


  • Increased 96.6 cubic feet interior volume1

  • 60/40 split-folding rear seatback

  • Flat-load trunk floor

  • Wider rear door openings for enhanced utility


  • Available 440-watt premium audio system with

    9 Harman Kardon speakers and amplifier

  • Performance-design front seats with Alcantara® seating

    surfaces or available leather-trimmed upholstery

  • Available power-adjustable driver’s seat

  • Leather-wrapped D-shaped sport steering wheel

  • Multifunction display with performance-gauge functions

  • Rear-Vision Camera

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Subaru is bringing the STI to America in three flavors at first, from Spring 2014 at dealers nationwide: the STI, STI Limited and the STI Launch Edition.


  • 305-hp turbocharged, 2.5-liter 4-cylinder SUBARU BOXER® engine

  • Driver-Controlled Center Differential (DCCD) All-Wheel Drive

  • SI-DRIVE performance management system

  • Brembo® performance braking system

  • 6-speed close-ratio manual transmission

  • Multi-mode VDC with Active Torque Vectoring

  • Multi-spoke 18-inch aluminum-alloy wheels

  • Black Alcantara®/Carbon Black Leather upholstery with red accents

  • 6-speaker single-CD audio system with HD Radio®, SiriusXM® Satellite Radio, USB port/iPod® control and Bluetooth® connectivity

  • Rear-Vision Camera

Optional Equipment

  • 440-watt premium audio system with 9 Harman Kardon speakers and amplifier, and Keyless Access & Start

  • Navigation System Package with Aha Infotainment

WRX STI LIMITED includes base WRX STI key features and adds:

  • 5-split-spoke 18-inch BBS® forged aluminum-alloy wheels

  • Auto-on/off headlights

  • Power-tilt/sliding moonroof

  • Carbon Black Leather upholstery with red accents

  • 8-way power adjustable driver’s seat

  • 440-watt premium audio system with 9 Harman Kardon speakers and amplifier

Optional Equipment

  • Navigation System Package with Aha Infotainment

  • Keyless Access & Start

WRX STI LAUNCH EDITION includes base WRX STI key features and adds:

  • Gold-painted 5-split-spoke 18-inch BBS® forged aluminum-alloy wheels

  • Keyless Access & Start

  • STI short-throw shifter

  • Leather-wrapped steering wheel with blue stitching

  • Black Alcantara®/Carbon Black Leather upholstery with blue accents

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Subaru Also provides a very insightful competitive comparison chart on Subaru.com, with the details includes below.

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Mitsubishi EVO GSR Sedan
VW Golf R 5-door
Audi A4 2.0T Sedan
BMW 335i xDrive Sedan
2.5-liter turbocharged 4-cylinder SUBARU BOXER®
2.0-liter turbocharged 4-cylinder 2.0-liter turbocharged 4-cylinder 2.0-liter turbocharged 4-cylinder 3.0-liter turbocharged 6-cylinder
305 HP @ 6,000 rpm
291 HP @ 6,500 rpm 256 HP @ 6,000 rpm 220 HP @ 4,250 rpm 300 HP @ 5,800 rpm
Power-to-Weight Ratio
11.1 lbs/HP
12.1 lbs/HP 12.9 lbs/HP 16.4 lbs/HP 12.3 lbs/HP
290 lb-ft @ 4,000 rpm
300 lb-ft @ 4,000 rpm 243 lb-ft @ 2,400 rpm 258 lb-ft @ 1,500 rpm 300 lb-ft @ 1,300-5,000 rpm
All-Wheel Drive
Symmetrical AWD with helical limited-slip front, Torsen limited slip rear and electronically controlled center differentials
S-AWC AWD with open front, electronically controlled center and rear differentials 4Motion® permanent AWD system with Haldex® center differential quattro® AWD xDrive® AWD
Manual Transmission 6-speed close-ratio 5-speed 6-speed 6-speed 6-speed
Electronic Torque Vectoring VDC
Standard (via Active Yaw Control) N/A N/A N/A
Driver Control Systems
SI-DRIVE throttle control, DCCD center differential control
Active Center Differential Control
(3 modes)
13.0:1 quick-ratio, hydraulic
13.3:1 ratio, hydraulic
15.6:1 ratio, electromechanical
15.9:1 ratio, electromechanical
Variable ratio, electrical
Front Suspension
Inverted strut, aluminum L-arm with pillowball joint mounts,
24mm stabilizer bar
MacPherson-type inverted strut with forged aluminum control arms, 25mm stabilizer bar Strut-type with lower control arms, coil springs, telescopic dampers, anti-roll bar Five-link Twin-tube front strut, aluminum
Rear Suspension
Double wishbone, lateral link with pillowball bushings, 20mm stabilizer bar
Multi-link type suspension with forged aluminum control arms (except for rear lower arms) and 23mm stabilizer bar Multilink with coil springs, telescopic dampers, anti-roll bar Trapezoidal-link Five-link
Standard: 18 x 8.5″ aluminum alloy Optional: 18 x 8.5″ BBS® forged alloy
245/40 R18 summer performance
18 x 8.5″ aluminum alloy
245/40 R18 asymmetrical
18 x 8.5″ aluminum alloy
225/40 R18 all-season
Standard: 18″ aluminum alloy
Optional: 19″
245/40 R18 all-season
Standard: 18″ aluminum alloy
225/45 R18 run-flat all-season
Passenger Volume
96.9 cu. ft.
93.2 cu. ft. 92.9 cu. ft 103.4 cu. ft. 96 cu. ft.
Rear-Vision Camera
N/A N/A Optional Optional
Curb Weight
3,386 lbs
3,527 lbs 3,325 lbs 3,627 lbs 3,695 lbs


Exterior Gallery

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Technical Gallery

Interior Gallery

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• New platform offers a stiffer, more agile chassis for Subaru’s global performance flagship model
• Bold new sedan model with aero body design
• High-performance chassis with new Active Torque Vectoring
• 305 hp turbo BOXER engine; most powerful engine in the segment
• Driver Controlled Center Differential All-Wheel Drive
• STI Launch Edition limited to 1,000 available

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DETROIT –  Subaru of America, Inc. today introduced the all-new 2015 WRX STI, Subaru’s iconic performance flagship model, at the North American International Auto Show. Subaru will offer a WRX STI Launch Edition, limited to 1,000 units and exclusively featuring WR Blue paint and gold BBS® forged alloy wheels and unique interior trim.

Powered by the legendary 305-horsepower 2.5-liter turbocharged BOXER engine, the 2015 WRX STI debuts a new four-door wide-body design, built on a stiffer chassis for even greater handling agility and precision. The WRX STI provides a rally-bred drivetrain and all-wheel drive handling that is unique to this model. Handling is enhanced with a stiffer chassis, firmer springs and faster steering (13.0:1 ratio).

New for the 2015 WRX STI, Active Torque Vectoring joins an arsenal of the model’s proven handling technologies that includes Multi-Mode Driver Controlled Center Differential (DCCD) Symmetrical All-Wheel Drive, Multi-Mode Vehicle Dynamics Control, and a Brembo® Performance Brake System with Super Sport ABS.

The 2015 WRX STI carries its bold personality inside, where new Alcantara seating surfaces accented by red and black leather bolsters and red stitching set the tone for the upgraded and roomier cabin. A driver-focused interior remains integral to the WRX STI performance character, with the new model debuting a motorsports-inspired flat-bottom steering wheel and new whiplash-reducing performance-design front seats with height and tilt-adjustable head restraints. A wide array of new user technologies include, for the first time in a WRX STI, availability of a harman/kardon® premium audio system.

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Iconic STI Design Exclusively in Sedan Form
A bolder front design makes the 2015 WRX STI look ready to devour the road. The “nose-cone” configuration combines the grille and bumper cap into one unit ahead of the hood, which for the 2015 model is made from aluminum to reduce weight over the front of the car. Narrower headlights, designed to evoke a raptor’s stare, flank the Subaru hexagonal grille. It’s a more powerful stare thanks to new standard LED low-beam headlights.

The special hood, fenders, doors and quarters, bumpers, headlights and taillight clusters convey the WRX STI identity. As on previous WRX STI models, a functional hood scoop supplies the intercooler with fresh air, and in the 2015 model it is set more deeply into the hood to provide better forward visibility.

Other new performance-oriented details include foglight surrounds with a carbon fiber-like pattern and front fender vents that feature a mesh screen. A full aerodynamic body package includes the large trunk spoiler that has been a WRX STI signature feature. A rear diffuser, LED taillights and LED center high-mount stop lamp (CHMSL) leave a distinctive signature.

New, Stiffer Chassis for Greater Handling Agility
The 2015 WRX STI body structure makes greater use of high-tensile steel than the previous model and features special stiffening elements at key locations. The stiffer chassis helps yield a super-quick steering response that was benchmarked against top-handling sports cars. The 13.0:1 steering ratio provides a quick 2.5 turns lock-to-lock compared to 14.5:1 and 2.8 for the standard WRX model.

As on previous WRX STI models, the 2015 version uses an exclusive inverted-strut front suspension system that provides higher levels of cornering agility. Aluminum front lower L-arms reduce unsprung vehicle weight. The STI-tuned suspension teams with standard 18-inch wheels and 245/40R18 summer performance tires, with the WRX STI Launch Edition and WRX STI Limited models featuring BBS® forged aluminum-alloy wheels.

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305-hp Turbo BOXER Engine
The 2015 WRX STI is powered by a 2.5-liter turbocharged/intercooled 4-cylinder BOXER engine that employs the Dual Active Valve Control System (Dual AVCS). The engine, which is exclusive to the STI model, produces 305 horsepower (SAE) at 6,000 rpm and 290 lb.-ft. of peak torque at 4,000 rpm.

The WRX STI engine is teamed exclusively with a specially reinforced 6-speed manual transmission, which includes an STI short-throw shifter in the Launch Edition model. Incline Start Assist can momentarily prevent the car from rolling backward when being driven away from a stop on an incline.

The Subaru Intelligent Drive (SI-DRIVE) powertrain management system allows the driver to tailor the car’s driving characteristics by choosing from among three selectable modes – “Intelligent,” “Sport” and “Sport Sharp” – using a rotary dial on the center console. SI-DRIVE alters vehicle performance characteristics by regulating the engine control module and by fine-tuning the electronic throttle control system.

Multi-Mode DCCD All-Wheel Drive with Three-Mode Vehicle Dynamics Control
The 2015 WRX STI is exclusively equipped with the Multi-Mode Driver Controlled Center Differential (DCCD) version of Subaru Symmetrical All-Wheel Drive. This sophisticated system uses planetary-type center differential gears with a nominal 41:59 torque split. A mechanical limited-slip type center differential augments an electronically controlled center differential to enhance torque transfer performance.

Sensor inputs that include steering angle, throttle position, RPM, lateral-g, yaw, brake, ABS and wheel speed govern torque transfer response. A helical-type limited-slip front differential and a TORSEN® torque-sensing limited-slip rear differential optimize side-to-side torque distribution.

The DCCD AWD system features three automatic modes, each using varying degrees of center differential locking to match different driving situations. In manual mode, the driver can select one of six center differential locking levels to suit the driving situation.

Active Torque Vectoring, an enhancement of the Multi-Mode Vehicle Dynamics Control (VDC) stability and traction control system, can apply brake pressure to the inside front wheel to facilitate more neutral cornering. The VDC system offers yet more driver choices, with three settings: “VDC Normal,” “Traction” and “Off.” Each provides respectively lesser degrees of system engagement, allowing the driver to tailor response for the driving situation. Active Torque Vectoring remains engaged for “Normal” and “Traction” modes.

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Premium Cabin
A one-inch longer wheelbase than the previous WRX STI helps provide a roomier cabin in the new model. The windshield is more raked than before, with the A-pillar pulled forward nearly eight inches at the base for better forward visibility, aided by a lower dashboard and narrower A-pillars. Lower side sills and wider-opening doors make ingress/egress easier. Rear seat legroom is increased by nearly two inches, and trunk capacity is now 12 cu. ft., up from 11.3 cu. ft. in the previous WRX STI sedan. A standard 60/40-split fold-down rear seat extends versatility. New available Welcome Lighting responds to the driver approaching the car.

In the 2015 WRX STI, the driver grips a new flat-bottom, leather-wrapped tilt/telescoping steering wheel that integrates switches for audio and Bluetooth control. The STI Design electroluminescent gauge panel gets a new 3.5-in. central LCD screen that displays various functions, including low-level warnings for oil and windshield washer fluid and the selected gear.

Rich-looking appointments and details abound, including soft-touch materials for the dashboard, door trim and center console armrest. A new multi-information central display with 4.3-in. LCD screen provides a multitude of vehicle system functions, including a standard rear camera display, a boost gauge display, audio (on non-navigation models), Bluetooth and climate control settings, and a VDC screen showing traction control operation. The display can also provide a vehicle self-check and maintenance reminder.

h_STI interior

Standard features for the 2015 WRX STI include dual-zone automatic climate control and the All-Weather Package (dual-mode heated front seats, heated exterior mirrors and windshield wiper de-icer). The new standard audio system combines AM/FM stereo with HD Radio®, a single-disc in-dash CD player, 6 speakers, MP3/WMA capability, Radio Data Broadcast System (RDBS), Bluetooth hands-free calling and audio streaming, iPod® control capability, iTunes® Tagging, SiriusXM® Satellite Radio (subscription required), USB port and a 3.5mm auxiliary audio input jack. Numerous compartments located in and around the center console hold phones, USB drives and MP3 players.

An available touch-screen navigation system displays on a 6.1-inch LCD screen and offers voice controls. The WRX STI Limited model adds the luxury of leather-trimmed upholstery, an 8-way power driver’s seat, the harman/kardon premium audio system and a power moonroof that opens one inch farther than on the previous model.


WRX gif 2015