2015 Subaru WRX STI revealed, packs 2.5-litre boxer with 227 kW

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Following last week’s photo leak, the 2015 Subaru WRX STI has been officially revealed at the North American International Auto Show in Detroit.

The new high performance sedan is powered by a turbocharged 2.5-litre Horizontally-Opposed Boxer engine developing 227 kW of power at 6000 rpm and 392 Nm of torque at 4000 rpm. The new model sees the use of lightweight construction to produce a lighter and more rigid chassis. Both body and suspension are stiffened, while optimised suspension geometry has quickened steering response for better cornering performance.

Also new in the 2015 WRX STI is the Multi-mode Vehicle Dynamics Control (VDC) with Active Torque Vectoring. A mechanical limited-slip type center differential is responsible for front-to-rear torque transfer, while a helical-type limited-slip front differential and a TORSEN® torque-sensing limited-slip rear differential optimise side-to-side torque distribution.

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Distributing power to all four wheels is a reinforced six-speed manual transmission. It includes the multi-mode DCCD system, allowing the driver to freely select centre differential control characteristics, depending upon road conditions and driver preferences.

Active Torque Vectoring, an enhancement of the 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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A 25mm 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 200mm at the base for better forward visibility, aided by a lower dashboard and narrower A-pillars. Front and rear door openings are enlarged, making entry and exit much easier, while boot space is expanded and made easier to use, thanks to fold-down rear seats with a large opening and 60:40 split.

The new WRX STI’s cockpit includes carbon-type trim panels and metal-type accents. The red accents on seats, gear shift lever and centre instrument panel are exclusive to the WRX STI. For the first time, WRX STI gets a sporty D-shaped flat-bottom steering wheel.

Pricing and specification of Australian WRX STI variants will be announced in the coming months.

2015 Subaru WRX STI Specifications (U.S. Only)
Body size (Overall length / width / height): 4595 x 1795 x 1475 mm
Wheelbase: 2650 mm
Engine: 2.5-litre turbocharged Horizontally-Opposed Boxer engine
Displacement: 2457 cc
Maximum output: 227 Kilowatts/ 6000 rpm
Maximum torque: 392 Newtonmetres/ 4000 rpm
Transmission: six-speed manual
Tyre size: 245/40 R18
Seating capacity: Five

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