What engine does the Lexus IS250 use?
The Lexus IS250 uses a 2.5-liter V6 engine.
Beyond this concise fact, the IS250's powertrain has defined the model since its mid-2000s introduction. The 2.5-liter V6 delivers smooth, refined performance and is paired primarily with a 6-speed automatic transmission. The engine features double overhead camshafts, 24 valves, and variable valve timing to balance power and efficiency. The following sections outline the engine’s core specs and how it appeared across markets and years.
Technical specifications
The following list summarizes the engine's main technical characteristics.
- Displacement: 2.5 L (2,499 cc)
- Configuration: V6
- Valvetrain: DOHC with 24 valves
- Variable valve timing: VVT-i
- Power output: approximately 204–208 horsepower, depending on year and market
- Torque: around 185 lb-ft (250 Nm)
- Transmission: 6-speed automatic is standard in most markets; manual transmissions were not commonly offered
In summary, the IS250’s engine architecture focuses on smoothness and efficiency, while providing enough output to maintain practical performance levels for a luxury sedan.
Market and generation notes
The IS250 was produced for multiple markets with a consistent core 2.5L V6, though tuning and emissions controls could yield slight output differences by year and region.
- United States/Canada: early IS250 models produced around 204 hp and 185 lb-ft of torque; 6-speed automatic transmission; manual option was rare and limited to certain special editions or markets.
- Europe and other regions: similar power levels with minor exhaust and tuning variations to meet local emissions and fuel economy requirements.
Across its production run, the engine maintained the same essential 2.5-liter V6 design, focusing on refinement and reliable performance in a compact luxury sedan.
Summary
The Lexus IS250 is powered by a 2.5-liter V6 with DOHC, 24 valves and VVT-i, delivering about 204–208 horsepower and roughly 185 lb-ft of torque, paired mainly with a 6-speed automatic transmission. This configuration underpins the IS250’s balance of smooth power, luxury refinement, and everyday usability.
