Subaru Brings WRX S4 with Significant Power Upgrades to Tokyo Auto Salon; Will it See Production?
Every year, Subaru uses the Tokyo Auto Salon to bring out new models that have been tuned by Subaru Tecnica International, the brand’s motorsport partner. This year they brought four models, the Subaru WRX S4 STI Sport, Impreza STI Sport, BRZ STI Sport, and the Levorg STI Sport, all concept cars designed for the show. What does the WRX S4 tell us about STI’s future plans?
It’s what’s under the hood of the WRX S4 STI Sport that could get performance enthusiasts excited, if Subaru decides to bring it to production models. The WRX concept car looks like a factory car but it gets engine tweaks to bump up the power. The FA20 2.0-liter direct injection turbocharged (DIT) Boxer engine gets a significant bump in power over the standard mill. STI says it pumps out 221 kW (296 hp) and 400 Nm (295 lb. ft of torque), up from the 268hp and 258 lb. ft of torque in the US-spec engine.
Will the extra power make it to a production model?
We know the new-generation FA20 DIT engine is capable of more, because the Japan-only WRX STI S207 gets 328hp, so it’s not any stretch for the engine to develop more power. What performance fans are hoping is that Subaru will bring out a new WRX STI with the FA20 mill with more power and replace the aging 305hp EJ25 2.5-liter engine.
STI also gave the WRX S4 STI Sport other performance upgrades like dedicated tuning Bilstein front struts (DampMatic Ⅱ, inverted type) and STI coil springs. It also gets an STI performance muffler, drilled disk rotors, STI under spoiler (front side and rear), dry carbon rear lip spoiler, and a special bumper. Inside it features special leather seats (Bordeaux / carbon black), exclusive genuine leather steering wheel, and STI shift knob. But it’s what’s under the hood that has the most potential for the performance WRX/STI.
Subaru upgraded the fourth-generation WRX in 2015 with the new FA20 engine, but chose to keep the WRX STI’s old power plant. Fans want to see the STI get the new-generation DIT mill with more power like the WRX. The Subaru WRX S4 STI Sport Concept car at the Tokyo Auto Salon gets extra power and performance goodies from Subaru Tecnica International. Will Subaru give STI performance enthusiasts what they want in a production vehicle?
Photo credit: Subaru