Toyota · R-Series Truck Four
Toyota 22R-E
The electronically fuel-injected evolution of Toyota's 22R truck engine.
144.4
Cubic inches
The 22R-E kept the rugged 22R bottom-end architecture while replacing the carburetor with EFI for easier starts, better drivability and emissions control.
Displacement
144.4 ci
Bore
3.622"
Stroke
3.504"
Years
1983–1995 EFI era
Key Takeaway
The 22R-E keeps the rugged 22R cast-iron bottom end and SOHC aluminum head but replaces carburetion with electronic fuel injection. The result preserves the same basic 2.4-liter truck architecture while improving cold starts, drivability, and emissions consistency.
Technical Specifications
- Horsepower
- Roughly 105–116 hp depending year and market
- Torque
- 140 lb-ft @ 2800 rpm in representative 1989 fuel-injected 22R-E service specification
- Architecture
- SOHC inline four
- Block
- Cast iron
- Cylinder heads
- Aluminum
- Valvetrain
- SOHC, 2 valves per cylinder
- Aspiration
- Naturally aspirated
- Fuel delivery
- Electronic fuel injection
The 22R-E keeps the rugged 22R cast-iron bottom end and SOHC aluminum head but replaces carburetion with electronic fuel injection. The result preserves the same basic 2.4-liter truck architecture while improving cold starts, drivability, and emissions consistency.
Internal Specifications
Variant-specific values are labeled. Engine families that span multiple years or RPOs can have different heads, cams, induction and rotating parts, so the exact code/year always takes priority.
Notable Applications
Strengths
- Simple EFI
- Excellent parts availability
- Durable cast-iron block
Weaknesses / Watch-outs
- Timing-chain guide wear
- Aging EFI sensors and wiring
- Limited stock airflow
Common Upgrades
- Metal timing-chain guides
- Header and exhaust
- Camshaft and cylinder-head work
Racing History & Legacy
The 22R-E became the best-known fuel-injected version of Toyota’s classic R-series truck engine. For many enthusiasts it represents the sweet spot between old-school mechanical simplicity and modern everyday drivability.
References & Image Credit
Engine image: dave_7 · CC BY 2.0 · source
Engineering Notes Worth Knowing
3.622 x 3.504-inch bore and stroke; 144.4 cu in / 2.4 L.
SOHC two-valve design with cast-iron block and aluminum head.
Factory output varied by year and market, roughly 105–116 hp.
Used in Pickup/Hilux, 4Runner, and selected Celica applications.
History · context · related reading
The Story Behind Toyota 22R-E
The 22R-E modernized one of Toyota’s most trusted truck engines without changing what owners already liked about it. EFI made the engine easier to live with while retaining the strong bottom end and simple serviceability that built the 22R name.
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