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The 2026 Subaru BRZ GT300 switches from the EJ20 four-cylinder used through the 2025 season to a 3.0-liter twin-turbo flat-six based on the Alcyone SVX’s EG33. It is not an unchanged production engine pulled from an old SVX: the race unit is a purpose-built development, with a different displacement and competition-specific hardware.
What engine is in the 2026 Subaru BRZ GT300?
Subaru says the GT300’s EJ20 campaign ended after the 2025 SUPER GT season. For 2026, the car moves to a water-cooled, 2,932 cc twin-turbo flat-six based on the EG33 from the Alcyone SVX. Subaru lists output at more than 500 PS at 7,000 rpm on its 2026 BRZ GT300 vehicle profile.
The 2026 car is entered in SUPER GT’s GT300 class and operated by R&D SPORT. Subaru names Takuto Iguchi and Hideki Yamauchi as drivers and Shunji Okumoto as reserve in its January 9, 2026 motorsport announcement.
Is it the original SVX engine?
No. The SVX connection is the engine’s lineage, not a claim that Subaru installed an intact, decades-old road engine in the racer. Subaru describes the unit as based on the SVX’s EG33; specialist reporting by Auto Prove characterizes it as a newly designed race engine built around EG principles, including a new block and cylinder heads.
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- Matab 1: 24
- Length 177 mm
- Width: 84 mm
- Working steering wheel
- Synthetic rubber tyres
The production SVX’s naturally aspirated EG33 displaced 3,318 cc. The GT300 engine is listed at 2,932 cc and uses twin turbochargers. Motor Fan reports that the racer’s bore and stroke are 90.0 × 76.8 mm, versus 96.9 × 75.0 mm for the original EG33; those dimensions are specialist reporting, not figures in Subaru’s vehicle profile.
| Specification | SVX production EG33 | 2026 BRZ GT300 engine |
|---|---|---|
| Displacement | 3,318 cc, according to Motor Fan’s January 16, 2026 comparison | 2,932 cc, according to Subaru’s vehicle profile |
| Induction | Naturally aspirated, according to Motor Fan | Twin-turbo, according to Subaru |
| Output | 240 PS at 6,000 rpm, according to Motor Fan | More than 500 PS at 7,000 rpm, according to Subaru |
| Application | Production road car | Purpose-built SUPER GT GT300 competition car |
Sources: Motor Fan and Subaru’s vehicle profile.
How the race car’s drivetrain differs
Subaru’s profile lists the GT300 as front-engine and rear-wheel drive, paired with a Hewland six-speed sequential transmission: six forward gears and one reverse, shifted by paddles. The 500-PS-plus figure belongs to this race-car specification; it should not be read as a specification for the showroom BRZ.
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The 2026 U.S.-market road BRZ specification lists a 2.4-liter four-cylinder engine. That production car and the GT300 racer are separate vehicles with different powertrains, as shown in the 2026 Subaru BRZ specifications.
Why Subaru changed from the EJ20
Subaru says the increase in displacement and move to more cylinders are intended to improve engine performance and strengthen competitiveness while developing the BRZ’s cornering strengths. The official profile also notes revised intercooler packaging and front aerodynamic parts, aimed at higher output, better cooling performance and endurance reliability.
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Those are development aims, not proof of a measured lap-time or championship improvement. The published specifications and announcements establish the new configuration and Subaru’s rationale, but do not establish that the car has achieved a particular result from the change.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What changed between the 2025 and 2026 GT300 cars?
| Area | Through 2025 | 2026 |
|---|---|---|
| Engine | EJ20 four-cylinder; Subaru says its campaign ended after the 2025 season | EG33-based, 2,932 cc twin-turbo flat-six |
| Announced development focus | Previous configuration | More engine performance and competitiveness; revised intercooler arrangement and front aerodynamic parts |
The 2025 engine detail and Subaru’s stated goals are from its 2026 motorsport announcement; the 2026 configuration and equipment are from its vehicle profile.
Quick Recap
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