The 2018 Toyota Sienna is powered by a 3.5-liter V6 engine.
For the 2018 model year, Toyota paired this 3.5L V6 with an eight-speed automatic transmission and offered front-wheel drive as standard with optional all-wheel drive, delivering smooth, confident performance for a family minivan.
Engine specifications
Key specifications include displacement, horsepower, torque, and drivetrain configuration that define the Sienna's day-to-day driving characteristics.
- Displacement: 3.5 L (3461 cc) V6
- Engine code: 2GR-FKS (3.5 L V6 with direct injection and port injection)
- Power: 296 horsepower at 6,300 rpm
- Torque: 263 lb-ft at 4,700 rpm
- Fuel delivery: D-4S direct injection with port injection
- Valvetrain: Dual Variable Valve Timing with intelligence (VVT-i)
- Transmission: 8-speed automatic
- Drivetrain: Front-wheel drive (standard); all-wheel drive optional
Conclusion: The 2018 Sienna’s engine combines a modern V6 design with multi-injection technology and a responsive 8-speed transmission to provide confident acceleration and capable highway performance for a family minivan.
Performance and efficiency considerations
The 3.5-liter V6 delivers strong mid-range torque suitable for carrying passengers and cargo, while the 8-speed automatic helps balance power and efficiency. AWD adds capability in adverse weather but can modestly affect fuel economy versus the standard FWD configuration.
Summary: For 2018, the Toyota Sienna relies on a 3.5-liter V6 (2GR-FKS) with 296 hp and 263 lb-ft of torque, paired with an 8-speed automatic and available AWD, delivering a balance of power, practicality, and reliability in the family-minivan segment.