The fastest production Subaru to date is the WRX STI S209, a limited-edition, STI-tuned variant that packs about 341 horsepower and all-wheel drive into a track-focused package. It represents Subaru's peak performance in a production car.
The question of which Subaru stands as the brand's fastest depends on how you measure speed: straight-line acceleration, top speed, or track performance. This article reviews the current record holder, the features that push it there, and how Subaru's fast lineup has evolved over time.
The WRX STI S209: Subaru's benchmark performance
The S209 is a rare, high-performance variant developed by Subaru Tecnica International (STI) for the U.S. market. It builds on the WRX STI platform with a revised turbocharged 2.0-liter flat-four, enhanced intercooling, a strengthened drivetrain, and aerodynamic and chassis upgrades designed for rapid track work and aggressive street performance. Subaru produced 209 units of this model, making it the most powerful and fastest Subaru in terms of production output to date.
Key characteristics of the S209 include a turbocharged 2.0-liter engine tuned by STI to produce about 341 horsepower and a substantial torque figure, standard six-speed manual transmission, improved suspension geometry, Brembo brakes, and weight-saving modifications. The exterior differences include a custom carbon-fiber and aero package and unique interior trim. The car is primarily aimed at enthusiasts seeking a factory-tuned machine with overt track-bred capabilities.
Performance snapshot
- Engine: Turbocharged 2.0-liter flat-four, STI-tuned
- Power: Approximately 341 hp
- Drivetrain: Symmetrical AWD with performance-tuned suspension
- Transmission: 6-speed manual
- Limited production: 209 units (US market)
- Notable features: Upgraded brakes, chassis reinforcement, aerodynamics, and bespoke interior
In terms of straight-line pace and track readiness, the S209's performance is among the strongest representations of Subaru's performance engineering. Its rarity and the fact that it is a limited-edition model contribute to its status as the brand's apex in production form.
Other fast Subarus and how they compare
Beyond the S209, Subaru's performance lineage includes limited-run editions and high-performance variants that pushed the envelope for speed and handling. While none match the S209 in terms of power and track-focused engineering, these models illustrate Subaru's approach to speed across different eras and markets.
- S207 and S208 (Japan-market STI variants) – Special editions of the WRX STI with enhanced chassis, braking, and aerodynamics, representing early STI efforts to push performance beyond the standard STI package.
- WRX STI (earlier generations) – The mainstay performance sedan for many years, with turbocharged power, AWD, and rally-bred handling. This lineage set the baseline for Subaru's performance capabilities.
- WRX (latest generation) – Modern, more refined than earlier WRX models, with performance-tuned options that improve handling and braking.
These variants demonstrate Subaru's willingness to experiment with performance tuning and limited editions, building toward or alongside the S209. The label "fastest" in Subaru's history thus depends on whether you're talking about peak horsepower, track-developed capability, or production scarcity. The S209 remains the definitive answer for fastest production Subaru by horsepower and track emphasis as of the current era.
What defines "fastest" for Subaru?
Speed can be measured in several ways, and Subaru's approach to speed reflects different engineering goals. The fastest car by horsepower and production intent is not always the quickest on a lap or the most aerodynamic. Subaru's performance storytelling emphasizes a balance of engine output, traction, weight, and chassis tuning that makes their fastest models unique on road and track.
Measurement methods
- Top speed: How fast the car can go in a straight line, limited by gearing and aerodynamics.
- Acceleration: 0-60 mph or 0-100 km/h performance, influenced by power, weight, and launch control (where applicable).
- Track performance: Laptimes and handling on a closed course, reflecting suspension, braking, and steering response.
In Subaru's current lineup, the S209 is the best-known answer to the question of "fastest," given its official status as a limited-edition, high-performance variant with the most power and track-ready engineering in the brand's production history to date.
Summary
Subaru's fastest production car to date is the WRX STI S209, a limited-edition, STI-tuned model that delivers about 341 horsepower from a turbocharged 2.0-liter flat-four, paired with all-wheel drive and a six-speed manual transmission. It embodies Subaru's pursuit of speed through a combination of power, traction, and chassis development. While other limited-edition STI models exist, the S209 stands as the benchmark for speed in Subaru's modern production era. As the brand evolves, enthusiasts will watch for any future high-performance variants that might surpass this benchmark, but for now, the S209 holds the title.