What engine is in a Lexus SC430?
The Lexus SC430 is powered by a 4.3-liter V8 from Toyota’s 1UZ-FE family, delivering roughly 290–300 horsepower and about 324 lb-ft of torque. This engine is paired with a 5-speed automatic transmission to support smooth, refined grand-touring performance.
Core engine details
Key facts about the SC430’s powerplant, including configuration, displacement, and output.
- Displacement: 4.3 liters (4,308 cc)
- Configuration: V8, 32 valves
- Engine family: 1UZ-FE
- Induction: Naturally aspirated
- Valvetrain: DOHC with Variable Valve Timing with intelligence (VVT-i) on the intake cam
- Power output: approximately 290–300 hp (216–224 kW)
- Torque: around 324 lb-ft (440 Nm)
- Transmission: 5-speed automatic with manual shift mode
Across its production years, the SC430’s 4.3-liter V8 emphasized smooth power delivery and refined performance suitable for long-distance driving and effortless highway cruising.
Design features and performance context
How the engine design supports the SC430’s character as a grand-tourer, along with notable technologies.
Technological highlights
The 1UZ-FE family powering the SC430 features a modern DOHC layout with 32 valves and Variable Valve Timing with intelligence (VVT-i) on the intake cam, which helps optimize both midrange torque and top-end power. The engine is designed to deliver a quiet, linear power curve that suits a luxury two-seater aimed at comfortable, high-speed cruising.
Fuel delivery and efficiency notes
Equipped with multi-port fuel injection and contemporary emissions controls for its era, the SC430’s V8 balances performance with relatively reasonable fuel economy for a car in its class, especially when driven in a relaxed, highway-focused manner.
Model-year context and reliability considerations
The SC430 was produced from the early 2000s through 2010, with the 4.3-liter V8 carrying through most of the model’s lifecycle. While individual wear and maintenance impact longevity, the 1UZ-FE family is widely regarded for durability when properly serviced, and routine items like gaskets, belts, and ignition components typically see longer intervals between major overhauls compared with some rival engines.
Summary
The Lexus SC430’s engine is a 4.3-liter V8 from the 1UZ-FE family, delivering about 290–300 hp and roughly 324 lb-ft of torque. Paired with a 5-speed automatic, the setup emphasizes smooth, refined acceleration and comfortable long-distance performance, aligning with the car’s grand-touring character.
