Subaru’s new 2015 standard WRX looks very promising in terms of what it has to offer. It is built on a longer and stiffer structure, it has a new 2.0 Direct Injected Turbo Flat-Four engine and according to Autoblog “due to its new Active Torque Vectoring- it has a sharper Turn-in than a Subaru BRZ”…and we all know how that handles (In case you don’t, I suggest you find out and come back to understand this reference). So if the new WRX is so good, how many more improvements could we expect from the new 2015 WRX STi? Well the new 2015 Subaru WRX STi has a couple of interesting things which is a combination of new and old-school tech.
What unfortunately is not new is the carried over EJ-Series 2.5 litre Turbo engine from the previous STi’s along with the same 6-speed transmission. This makes 305 horsepower @ 6,000 rpm and 290 lb.-ft. of peak torque @ 4,000 rpm, which is identical to the previous generation STi. So no direct injection, but the silver lining is that since this is the same EJ-series engine found on the previous STi’s, engine tuning would pretty familiar amongst the Subaru tuners community.
The noticeable difference (Tada!) would be in the way the new STi will handle. The STi’s chassis will be a bit stiffer thanks to strategically placed braces and with the wheel-base being longer, it will add to stability. The Active Torque-Vectoring system seen on the WRX will aid the STi’s DCCD AWD system. This system effectively brakes the inside front wheel while turning into a corner to neutralize any under-steer. Although the Standard WRX features an electrical-power steering with decent feedback, Subaru has decided to give the STi a Hydraulically powered steering for a more direct and purer feel. Awesome! The steering also features a much faster 13.0:1 steering ratio, 2.5 turns lock to lock compared to the 14.5:1 and 2.8 standard WRX.
The DCCD on the AWD system will have a nominal torque split of 41-percent to the front and 59-percent to the rear. DCCD will also feature 3 automatic modes and up to 6 manual stages of center differential lock. The AWD system will feature the same mechanical limited-slip center differential along with a front helical-type and rear torsen type LSD as the previous gen STi. So combine this with the new active torque vectoring and what you get is an STi which has more front-end authority and chassis responsiveness than previous STi’s. According to Motor Trend, Subaru engineers have bench-marked the new Porsche 911 in terms of ‘responsiveness‘…can’t wait to test this in person! The new STi will also feature Brembo Performance Brake System with the new Super Sport ABS.
The 2015 STi will be sold along side a limited ‘Launch Edition’ which will feature the World Rally Blue paint with Gold BBS Rims, Push button start and a Short Throw Shifter. Lets just say my feelings towards the new 2015 STi is = ‘Shut up and take my money!’