What engine does the Toyota Sienna use?

[MayaLee]

Toyota Sienna is equipped with a 3.5-liter V6 naturally aspirated engine, and the Sienna is available in both front-wheel-drive and all-wheel-drive versions. The 3.5-liter naturally aspirated engine in the Sienna has a maximum power of 198 kW, a maximum torque of 332 Nm, a maximum power speed of 6200 rpm, and a maximum torque speed of 4700 rpm. The 3.5-liter naturally aspirated engine is paired with a 6-speed automatic transmission. The Toyota Sienna uses a MacPherson strut independent suspension at the front and a torsion beam non-independent suspension at the rear. This vehicle is also equipped with a mechanical hydraulic power steering system.

[LeCorbin]

I bought a Toyota Sienna Hybrid last year, and it has almost reached 30,000 kilometers. The car uses Toyota's signature 2.5-liter hybrid system. The A25A engine is paired with two electric motors, allowing for silent driving in traffic jams and smooth engine engagement on highways. Last time, I took a long trip with my family of six plus luggage, and the displayed fuel consumption was only 6.2L per 100 km. A full tank can cover over 900 kilometers. However, when fully loaded and climbing steep slopes, you can hear the engine roar, but thankfully the electric motor can immediately provide extra power. This powertrain is truly a golden combination for a family MPV.

[TaylorLee]

Having repaired Toyota vehicles for over a decade, I can disassemble and reassemble the Sienna Hybrid's 2.5L naturally aspirated engine blindfolded. The engine code is A25A-FXS, featuring a unique Atkinson cycle design with a 14:1 compression ratio. It integrates seamlessly with the generator and drive motor, and its power split device is particularly ingenious. Remember to use 0W-20 grade oil for changes, and inspect the hybrid battery cooling ducts every 80,000 kilometers. This engine rarely has major issues, though spark plug replacement is slightly more complicated than in gasoline vehicles.

[LaMatteo]

From an environmental perspective, the hybrid system of the Toyota Sienna is truly impressive. The 2.5L engine achieves a thermal efficiency of 41%, saving nearly half a tank of fuel compared to my old gasoline car. It's most cost-effective during Beijing's morning rush hour, with zero emissions from electric motor operation and no need for plug-in charging. Manufacturer data shows CO2 emissions of only 108 grams per kilometer, one-third less than other MPVs in its class. This powertrain utilizes a planetary gear set for energy distribution, converting kinetic energy into electricity during deceleration, and the battery pack is placed under the seats without occupying trunk space.

[Myrtle]

The Sienna's engine has a maximum power output of 192 horsepower, combined with the electric motor for a total of 249 horsepower, paired with an E-CVT transmission. My tests showed a 0-100 km/h acceleration time of just over 8 seconds, slightly slower than the old 3.5L V6 but much more fuel-efficient. During daily driving, the engine speed is generally kept below 2000 rpm, and there's no tachometer. Note that it uses a high-voltage nickel-metal hydride battery, and the engine may start more frequently when temperatures are very low. Regularly adding fuel injector cleaner helps maintain power.

[MadelynFitz]

As a father of two, I'm most satisfied with the hybrid performance of the Sienna. When picking up and dropping off the kids at school, it mostly relies on electric motor drive, making the cabin as quiet as a library. On weekend family trips, the 2.5L engine combined with the 134kW motor provides plenty of power for climbing hills and overtaking, with fuel consumption around 6L per 100km. This powertrain uses Toyota's latest THS technology, with significantly reduced engine vibration compared to the previous generation, and no noticeable power loss when the AC is running. After two years of driving, apart from regular maintenance, it hasn't needed any repairs - it's incredibly reliable.