
The Avalon's engine is produced by Tianjin FAW Toyota Engine Co., Ltd., and is a domestically manufactured engine. The 2.0L version of the Avalon's engine has the model number M20A, with a maximum power of 131kw, maximum horsepower of 178 HP, and peak torque of 210Nm. The 2.5L version has the model number A25A, with a maximum power of 154kw, maximum horsepower of 209 Ps, and peak torque of 250Nm. For daily maintenance of the Avalon's engine, the following methods can be used: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions. For diesel engines, choose CB--CD grade diesel engine oil based on mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly change the oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, performance deteriorates, leading to various engine problems. To avoid malfunctions, change the oil regularly according to usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter becomes clogged and oil cannot pass through, the filter may burst or the safety valve may open, allowing oil to bypass the filter and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates properly but also extends the overall lifespan of the radiator and engine.

The Avalon offers a diverse range of engine options, primarily divided into gasoline and hybrid versions. The gasoline variants include a 2.0-liter and a 2.5-liter naturally aspirated four-cylinder engine. The 2.0-liter engine delivers a maximum horsepower of 178 hp, paired with a CVT transmission, providing smooth and fuel-efficient performance ideal for daily commuting. The 2.5-liter engine, with 209 hp, is matched with an 8-speed automatic transmission, offering quicker power response and more confidence on highways. The hybrid version combines a 2.5-liter engine with an electric motor, producing a total system horsepower of 218 hp. It operates quietly and efficiently at low speeds using electric power, with a combined fuel consumption of around 5 liters per 100 km. All these engines feature Toyota's dual injection technology and variable valve timing, achieving high thermal efficiency. Having driven the 2.5-liter hybrid version, I found it light and agile for city starts, with smooth engine engagement during highway overtaking. The overall tuning leans towards comfort, making long drives less tiring.

During my test drive of the Avalon, I paid special attention to the engine performance. It offers three powertrain options: the entry-level 2.0L naturally aspirated engine with 178 horsepower is sufficient for family use; those seeking more power can opt for the 2.5L gasoline version; the most popular choice is the 2.5L hybrid variant. The hybrid system's electric motor operates silently during initial acceleration, with pure electric drive predominantly below 80 km/h—the gasoline engine only engages during hard acceleration or high-speed cruising. The engine bay features a compact layout with excellent thermal management, showing no overheating warnings even in summer traffic jams. Fuel efficiency is truly impressive, with the hybrid version achieving 4.3-5.2L/100km in real-world tests, capable of nearly 1,000 km on a full tank. Regarding maintenance, the engine structure is simpler than turbocharged units, and naturally aspirated engines have lower upkeep costs, making it ideal for long-term ownership.

The Avalon's engine lineup is quite pragmatic, with the main offerings being the TNGA-based 2.0L and 2.5L naturally aspirated engines. The 2.0L version delivers 178 horsepower paired with a CVT transmission, achieving around 7L/100km fuel consumption—offering adequate power while being economical. The 2.5L gasoline variant produces 209 horsepower and is mated to an 8-speed automatic transmission. The hybrid system combines a 2.5L engine with an electric motor, yielding a combined output of 160 kW. Having studied the technical details, these engines employ direct injection and dual-cycle systems with a high compression ratio of 14:1. Most impressively, their refinement is exceptional—the auto start-stop is nearly imperceptible, and acceleration/deceleration feels as linear as an electric vehicle. Last year, I drove it on the Sichuan-Tibet route, where its power loss at high altitudes was significantly less noticeable than turbocharged cars, demonstrating truly solid reliability.


