The Subaru WRX STI (facelift 2018) EJ20 Final Edition 2.0, a high-performance variant of the WRX STI, represents the culmination of Subaru’s rally-bred engineering. Introduced in 2019, this model served as a send-off to the iconic EJ20 engine, a powerplant deeply ingrained in the STI’s history. Positioned as the top-tier offering within the facelifted WRX STI range, the Final Edition aimed to deliver an uncompromising driving experience for enthusiasts. It’s built on the Subaru Global Platform, a chassis shared with other Subaru models, but heavily reinforced and tuned for performance. The “Final Edition” designation signified the last production run utilizing the EJ20 engine before Subaru transitioned to a newer powerplant in subsequent models.
Technical Specifications
| Brand | Subaru |
| Model | WRX STI |
| Generation | WRX STI (facelift 2018) |
| Type (Engine) | EJ20 Final Edition 2.0 (309 Hp) AWD |
| Start of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 4.9 kg/Hp, 206 Hp/tonne |
| Weight-to-torque ratio | 3.6 kg/Nm, 281.3 Nm/tonne |
| Power | 309 Hp @ 6400 rpm |
| Power per litre | 155 Hp/l |
| Torque | 422 Nm @ 4400 rpm (311.25 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EJ20F |
| Engine displacement | 1994 cm3 (121.68 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Boxer |
| Cylinder Bore | 92 mm (3.62 in.) |
| Piston Stroke | 75 mm (2.95 in.) |
| Compression ratio | 8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | DOHC, AVCS |
| Engine oil capacity | 5.1 l (5.39 US qt | 4.49 UK qt) |
| Coolant | 8.1 l (8.56 US qt | 7.13 UK qt) |
| Kerb Weight | 1500 kg (3306.93 lbs.) |
| Max. weight | 1775 kg (3913.21 lbs.) |
| Max load | 275 kg (606.27 lbs.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Length | 4595 mm (180.91 in.) |
| Width | 1795 mm (70.67 in.) |
| Height | 1475 mm (58.07 in.) |
| Wheelbase | 2650 mm (104.33 in.) |
| Front track | 1530 mm (60.24 in.) |
| Rear track | 1540 mm (60.63 in.) |
| Ride height (ground clearance) | 140 mm (5.51 in.) |
| Minimum turning circle | 11.2 m (36.75 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent coil spring |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 245/35 R19 |
| Wheel rims size | 8.5J x 19 |
Powertrain & Engine Architecture
The heart of the Final Edition is the 2.0-liter EJ20F boxer engine, a horizontally opposed four-cylinder. This engine is turbocharged with a twin-scroll setup, enhancing both responsiveness and power delivery. The EJ20’s design, with its flat configuration, contributes to a low center of gravity, improving handling characteristics. Fuel is delivered via multi-point fuel injection, and the engine utilizes Subaru’s Active Valve Control System (AVCS) on both intake and exhaust camshafts, optimizing valve timing for increased efficiency and performance across the rev range. The engine produces 309 horsepower at 6,400 rpm and 422 Nm (311.25 lb-ft) of torque at 4,400 rpm. The sole transmission option is a robust 6-speed manual gearbox, chosen for its direct connection and driver engagement. The all-wheel-drive system, a hallmark of the STI, employs a driver-controlled center differential, allowing for adjustments to the front/rear torque bias.
Driving Characteristics
The 6-speed manual transmission in the Final Edition provides precise and engaging shifts. The close-ratio gearing is optimized for spirited driving, keeping the engine within its peak power band. Compared to earlier WRX STI models, the Final Edition benefits from improvements to the engine management system and turbocharger response, resulting in reduced turbo lag. While the power output is substantial, the car’s all-wheel-drive system and well-tuned suspension provide excellent traction and stability. The driving experience is firm, reflecting the car’s performance focus, but remains manageable for daily use. Compared to a hypothetical WRX with a less powerful engine and automatic transmission, the Final Edition offers significantly more acceleration and a more connected driving feel.
Equipment & Trim Levels
The Final Edition came generously equipped, building upon the already well-appointed WRX STI. Standard features included Recaro bucket seats providing exceptional lateral support, a premium audio system, leather-wrapped steering wheel, and automatic climate control. Exterior enhancements included unique badging, a distinctive rear wing, and specific alloy wheel designs. Optional extras typically included a sunroof and upgraded infotainment systems. The interior trim was generally dark, with a focus on sporty aesthetics. The emphasis was on creating a driver-focused environment, prioritizing functionality and performance over outright luxury.
Chassis & Braking
The WRX STI’s chassis is reinforced compared to the standard WRX, featuring additional bracing and stiffer suspension components. The front suspension utilizes inverted MacPherson struts, while the rear employs a double-wishbone setup. Both ends feature coil springs and anti-roll bars. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) is standard, enhancing safety and control during hard braking. The suspension tuning is firm, prioritizing handling precision over ride comfort.
Market Reception & Comparison
The Final Edition was met with considerable enthusiasm from Subaru enthusiasts and collectors. Critics praised its performance, handling, and the emotional connection to the EJ20 engine. Fuel economy, at 10.6 l/100 km (22.2 US mpg), was typical for a high-performance vehicle of this type. Compared to other WRX STI trims, the Final Edition commanded a premium price due to its limited production run and unique features. Compared to the standard WRX, the STI, and particularly the Final Edition, offered a significantly more focused and capable driving experience, albeit with a trade-off in terms of ride comfort and fuel efficiency.
Legacy
The Subaru WRX STI EJ20 Final Edition 2.0 holds a special place in Subaru’s history. It represents the end of an era for the EJ20 engine, a powerplant that defined the STI for decades. The Final Edition is now a sought-after collectible, with values steadily increasing. The EJ20 engine, while known for its performance potential, can require more frequent maintenance than some newer engines, particularly regarding head gasket reliability. However, the robust build quality and readily available parts supply ensure that these cars can be kept running for years to come. The Final Edition serves as a reminder of Subaru’s commitment to rally-inspired performance and its dedication to creating engaging driving experiences.
