According to statistics from the China Internal Combustion Engine Industry Association, in December 2025, sales of internal combustion engines reached 4.7454 million units, a month on month decrease of 1.97% and a year-on-year increase of 0.98%; The power output reached 284.3403 million kilowatts, a month on month decrease of 9.30% and a year-on-year decrease of 3.50%. The annual sales volume was 53.811 million units, a year-on-year increase of 12.76%; The annual power output reached 3185626800 kilowatts, a year-on-year increase of 9.09%.

Classification of fuel types:

In December, among the fuel categories, diesel engine sales increased month on month, year-on-year, and cumulative year-on-year; The sales of gasoline engines have decreased month on month and year-on-year, with a cumulative year-on-year increase. Specifically, compared to the previous month, diesel engines increased by 2.75%, while gasoline engines decreased by 2.38%; Compared with the same period last year, diesel engines increased by 11.62% year-on-year, while gasoline engines decreased by 0.12% year-on-year; Compared with the same period last year, diesel engines increased by 6.80% year-on-year, and gasoline engines increased by 13.34% year-on-year.

In December, diesel internal combustion engines sold 456300 units (including 14700 units for passenger cars, 190500 units for commercial vehicles, 67000 units for construction machinery, 136600 units for agricultural machinery, 4600 units for ships, 41700 units for power generation, 400 units for landscaping, and 800 units for general use), and gasoline engines sold 4.2825 million units. The annual sales of diesel engines were 5.126 million units (including 172300 units for passenger cars, 2.0406 million units for commercial vehicles, 845700 units for construction machinery, 1.5101 million units for agricultural machinery, 64000 units for ships, 476500 units for power generation, 6700 units for landscaping, and 10200 units for general use), and the sales of gasoline internal combustion engines were 48.6059 million units.

Market usage situation:

In December, in the comparable segment of the segmented market, power generation, landscaping, and motorcycle usage increased month on month, while other uses decreased month on month. Specifically, passenger car usage decreased by 11.35%, commercial vehicle usage decreased by 1.08%, construction machinery usage decreased by 4.95%, agricultural machinery usage decreased by 1.46%, marine usage decreased by 14.93%, generator usage increased by 36.41%, garden machinery usage increased by 12.07%, motorcycle usage increased by 5.57%, and general machinery usage decreased by 14.84%.

Compared with the same period last year, except for the year-on-year growth in commercial vehicles, power generation, and motorcycles, other uses decreased year-on-year. Specifically, passenger car usage decreased by 12.87%, commercial vehicle usage increased by 23.05%, construction machinery usage decreased by 2.47%, agricultural machinery usage decreased by 19.98%, marine usage decreased by 13.85%, generator set usage increased by 10.60%, garden machinery usage decreased by 1.10%, motorcycle usage increased by 26.42%, and general machinery usage increased by 1.84%.

Compared with the cumulative increase of the previous year, all other classified uses except for construction machinery have shown positive growth. Specifically, passenger car usage increased by 7.70%, commercial vehicle usage increased by 13.75%, construction machinery usage decreased by 0.77%, agricultural machinery usage increased by 1.01%, marine usage increased by 11.83%, generator set usage increased by 11.75%, garden machinery usage increased by 8.29%, motorcycle usage increased by 23.98%, and general machinery usage increased by 8.01%.

In December, the sales volume of passenger cars was 1.8518 million units, commercial vehicles was 25.91 million units, construction machinery was 71800 units, agricultural machinery was 440900 units, ships were 4600 units, generators were 187800 units, garden machinery was 149900 units, motorcycles were 1.7592 million units, and general machinery was 20300 units.

In 2025, the annual sales of passenger cars will be 21.2604 million units, commercial vehicles will be 2.7307 million units, construction machinery will be 899600 units, agricultural machinery will be 5.2707 million units, ships will be 64000 units, generators will be 1.81 million units, garden machinery will be 1.6356 million units, motorcycles will be 19.9364 million units, and machinery will be 203500 units.

Main varieties classified by single and multi cylinder usage:

single-cylinder diesel engine

The sales volume of single cylinder diesel engines in December increased month on month and year-on-year, with a cumulative year-on-year growth. In December, sales of single cylinder diesel engines reached 96300 units, a month on month increase of 8.08% and a year-on-year increase of 10.22%; The annual sales volume was 994200 units, a year-on-year increase of 4.56%. The top five companies in the ranking are: Changchai, Changfa, Sifang, Sanhuan, and Kemer. Among them, the sales volume of single cylinder diesel engines mainly used in the field of agricultural machinery in December was 86300 units, a month on month increase of 6.72% and a year-on-year increase of 14.47%; The annual sales volume was 891400 units, a year-on-year increase of 5.02%.

Multi cylinder diesel engine

The commercial vehicle market continues to improve, with a month on month and year-on-year increase in production and sales in December, and a cumulative year-on-year increase in sales, leading to a convergence and fluctuation in sales in the multi cylinder diesel engine market, where commercial vehicles account for a large proportion.

In December, multi cylinder diesel engine companies sold a total of 360000 units, a month on month increase of 1.41% and a year-on-year increase of 12.00%; The annual sales volume was 4.1317 million units, a year-on-year increase of 7.35%. Weichai, Yuchai, Yunnei, Quanchai, Xinchai, Dongkang, Jiangling, New Power Technology, Fukuda Cummins, and Honeycomb Power ranked among the top ten in sales, accounting for 78.45% of the total sales of multi cylinder diesel engines; Market share proportions include: Weichai 19.54%, Yuchai 13.29%, Yunnei 8.56%, Quanchai 8.09%, Xinchai 6.04%, Dongkang 5.36%, Jiangling 4.98%, New Power Technology 4.29%, Foton Cummins 4.16%, and Honeycomb Power 4.15%.

In December, the sales volume of multi cylinder diesel engines for commercial vehicles was 190500 units, a month on month increase of 0.82% and a year-on-year increase of 23.92%; The annual sales volume was 2.0406 million units, a year-on-year increase of 10.46%. The top ten sellers are Weichai, Yuchai, Jiangling, Yunnei, Fukang, Quanchai, Jiefang Power, New Power Technology, Jianghuai, and Dongkang, accounting for 88.08% of the total sales; Weichai holds a leading market share of 23.02%, Yuchai 11.73%, Jiangling 10.09%, Yunnei 9.42%, Fukang 8.42%, Quanchai 5.51%, Jiefang Power 5.35%, New Power Technology 4.89%, Jianghuai 4.83%, and Dongkang 4.82% in the commercial vehicle multi cylinder diesel engine market.

In December, the sales volume of multi cylinder diesel engines for construction machinery was 65400 units, a month on month decrease of 4.87% and a year-on-year decrease of 3.06%; The annual sales volume was 830800 units, a year-on-year decrease of 0.03%. The top ten sellers are Xinchai, Yunnei, Quanchai, Yuchai, Weichai, Dongkang, Guangkang, New Power Technology, Caterpillar, and Jiefang Power, accounting for 95.38% of their total sales.

Multi cylinder gasoline engine

The passenger car market saw a month on month and year-on-year decline in production and sales in December, with cumulative year-on-year growth. As a result, the sales of multi cylinder gasoline engines in the main supporting passenger car market also showed a similar trend. In December, the sales of multi cylinder gasoline engines reached 1.9018 million units, a month on month decrease of 11.08% and a year-on-year decrease of 12.33%; The annual sales volume was 21.7325 million units, a year-on-year increase of 7.86%. Among 46 multi cylinder gasoline engine companies, Chery, BYD, Geely, FAW Volkswagen, Changan Automobile, Honeycomb Power, Xiaokang Power, Guangfeng Engine, Shangtong Wuling, and FAW Toyota Tianjin rank among the top in terms of sales, accounting for 64.29% of the total sales. Among the companies with high sales volume, Chery, Geely, Honeycomb Power, Xiaokang Power, Shangtong Wuling, and FAW Toyota Tianjin have shown outstanding sales growth.

The proportion of passenger cars used in multi cylinder gasoline engines was 97.03%, with sales of 1.8371 million units in December, a month on month decrease of 11.40% and a year-on-year decrease of 13.02%; The annual sales volume was 21.0881 million units, a year-on-year increase of 7.57%. Chery, BYD, Geely, FAW Volkswagen, Changan Automobile, Honeycomb Power, Xiaokang Power, Guangfeng Engine, Shangtong Wuling, and FAW Toyota Tianjin rank among the top sellers in terms of sales.

Small gasoline engine

The industry mainly engages in import and export trade, which is significantly affected by internal and external environmental factors. In comparable caliber, the sales of small gasoline engines in December increased month on month, decreased year-on-year, and accumulated year-on-year growth. In December, the sales volume of small gasoline engines was 839600 units, an increase of 11.11% month on month and a decrease of 14.06% year-on-year; The annual sales volume was 9.2979 million units, a year-on-year increase of 3.71%. The top five companies in terms of sales are Runtong, Longxin, Huasheng, Lifan Internal Combustion Engine, and United Power.

In the supporting agricultural machinery, the sales volume in December was 304300 units, a month on month decrease of 6.39% and a year-on-year decrease of 28.13%; The annual sales volume was 3.7606 million units, a year-on-year increase of 0.84%. In the field of supporting garden machinery, sales in December were 149500 units, a month on month increase of 12.25% and a year-on-year decrease of 0.72%; The annual sales volume was 1.6289 million units, a year-on-year increase of 8.48%.