Toyota is developing a new 2.0L turbo engine, codenamed the G20E. It’s a compact 2.0 L turbo four‑cylinder under serious development. Factory engineers aim for 400 HP in road trim, and over 600 HP in racing guise.
Engine Architecture & Design
The G20E uses twin-overhead cams and four valves per cylinder. It supports GDI, or gasoline direct injection, with a shorter stroke than current engines, making it compact and lightweight.
Cylinder spacing is deliberately widened, allowing future boring upgrades, just like the revered 2JZ architecture.
Turbocharging & Output Potential
Factory tests use a stock IHI turbo to hit 400–450 HP in the GR Yaris M mid-engine prototype.
Supplies suggest a larger turbo could easily yield >600 HP.
This engine is built for staged tuning: 400–500 HP for road use, with full race trim stretching to the 600 HP mark.
Packaging & Mounting Flexibility
G20E can be mounted both transversely and longitudinally, making it fit front-engine and mid-engine layouts. Its compact size and weight allow for hybrid pairing, whether plug-in or mild hybrid, for future GR models.
Motorsport Lineage & Performance DNA
This engine builds on Toyota’s success with turbocharged four-cylinder racers. Their Super GT engine (RI series) hits ~680 BHP, proving Toyota’s four-cylinder expertise.
The G20E echoes this philosophy—it is tuned with racing in mind from day one. Professional drivers at extremes validated its performance from the Yaris M concept’s development.
Internals & Durability
We expect an open-deck block, a DOHC head and a compression ratio of 10.5:1, similar to the G16E-GTS but with space for reinforcement.
GR Yaris parts already endure rally conditions, and stock internals can handle 500–600 HP with head studs and valve-spring mods.
Emissions, Hybridisation & Efficiency
Though capable of 600 HP, production versions will be detuned to lesser HP to meet emissions standards. It’s hybrid-ready; engineers specifically designed it for minimal weight penalties when paired with electric drive. It also accepts sustainable carbon-neutral fuels.
Applications & Future Models
Beyond the Yaris M prototype, G20E is expected in the next-gen MR2 GRMN, Celica GRMN, Supra successor, and even hot-hatch versions. Its flexible layout opens doors to rear-mid-engine performance cars. Toyota’s Gazoo Racing division has even tested it in a prototype Lexus IS!
Verdict
Toyota’s G20E defines the future of compact, high-power turbo engines. Road versions promise 400–500 HP, more than enough for thrilling performance. Motorsport-spec units may exceed 600 HP.
Its design is modular and durable: strong internals, tuner-friendly layout, hybrid compatibility and support for sustainable fuels. The G20E is a mechanical statement, a promise of raw, engineering-led performance in future GR icons. It has the potential to be the next B58.
