What kind of engine is in the Lexus RX 450h?
The RX 450h uses a hybrid powertrain that blends a 3.5-liter V6 gasoline engine with electric motors, delivering a combined output of about 295 horsepower.
Hybrid powertrain at a glance
The RX 450h employs Lexus Hybrid Drive, a parallel hybrid system that can run on electric propulsion at low speeds and automatically engage the gasoline engine for higher power or to recharge the battery. This setup aims to combine quiet, efficient city driving with confident highway performance.
Key components of the hybrid powertrain include:
- Gasoline engine: 3.5-liter V6, typically the 2GR-FXE Atkinson-cycle engine designed for efficiency.
- Electric propulsion and generation: two electric motors, commonly referred to in the Hybrid Drive architecture as MG1 and MG2, providing drive assist and regenerative charging.
- Hybrid system: THS II (Lexus Hybrid Drive), a parallel configuration that blends power from both the gasoline engine and electric motors.
- Battery: Nickel-metal hydride (NiMH) battery pack that stores electrical energy for the motors.
- Transmission: Electronically controlled CVT integrated with the hybrid system to deliver smooth power delivery.
- Total system output: about 295 horsepower (220 kW) when the gasoline engine and electric motors work together.
Together these components enable electric-only operation at low speeds, seamless power assistance from the gas engine when needed, and improved efficiency compared with a conventional V6 SUV.
Why this matters for drivers
For buyers, the hybrid powertrain translates into better city fuel economy, smoother acceleration, and the flexibility to drive in electric mode for short stretches. The RX 450h’s engine is designed to maximize efficiency without sacrificing the practical performance expected of a luxury SUV.
Summary
The Lexus RX 450h relies on a 3.5-liter V6 gasoline engine in Atkinson-cycle configuration, paired with two electric motors as part of the Lexus Hybrid Drive THS II system. The combination yields a reported total output around 295 horsepower, a Nickel-metal hydride battery, and an electronically controlled CVT to coordinate blended power delivery for efficient, refined performance.
