4A9 1 throttle

4G 15 engine: belt timing system with cast iron middle cylinder, and mechanical throttle ignited by two cylinders simultaneously.

4A9 1 engine: single cylinder independent ignition electronic throttle, all-aluminum engine chain timing system.

Compared with the two engines, the power of 4A9 1 engine is about 10KW higher than that of 4G 15 engine, but the fuel consumption is slightly higher than that of 4G 15 engine. The maintenance cost of 4G 15 engine is slightly lower than 4A9 1 engine.