What is it?
Despite the appearance of this Subaru WRX STI 320R, the manufacturer recently asserted that it no longer wants its performance models to dominate the brand limelight like they have done in the past.
Thanks to a combination of recession and high fuel prices, the WRX STI’s segment has become a crumbling niche and Subaru now believes that fresh ‘lifestyle’ products would be more likely to generate the showroom traffic which was previously buoyed by rally-inspired ironmongery.
Nevertheless, the current model, already reinvigorated by the welcome addition of a saloon profile last year, remains a key part of the Subaru portfolio and there’s evidently enough enthusiasm for it at the company’s UK division that time and money has been invested in improving its performance.
The 320R is a upgrade pack which can be specified at the point of sale (where it’s currently available as a non-badged special edition) or retro-fitted at a later date. The pack is offered free on the £32,995 standard car until the end of the year, but the power upgrade is worth £799 and the accompanying satnav is worth £750.
Previous incarnations would have been a messy mechanical affair involving a new exhaust, but this time round Subaru has found an extra 20bhp simply by remapping the ECU on the standard 296bhp 2.5-litre Boxer engine.
What’s it like?
Apparently the 320R enhancement was ushered through the development stage by a former employee of Prodrive, Subaru’s former tuner-extraordinaire. The connection is fitting as the software embellishment is the precisely the kind of performance enhancer the British firm used to rustle up for its employer.
The remap is intended to improve the flat-four engine’s flexibility by producing more torque at lower revs. This it does: 332lb ft at 3400rpm as opposed to 300lb ft at 4000rpm, but the reality is just a very slightly shorter pause before the boxer finally stretches its legs beyond the initial listlessness.
That things have improved from there on is evidenced in the figures, where the 320R trumps its lesser sibling’s 5.2 second 0-60mph time with a claimed 4.9 second sprint. Real world that doesn’t translate into a dramatic difference, but the higher power output does appear marginally quicker at 5200rpm, making all 316bhp readily available between corners.