What are the differences between China III and China IV motorcycles?
2 Answers
China III and China IV motorcycles mainly differ in their exhaust emission standards. Below are the relevant introductions for China III and China IV: 1. Both China III and China IV refer to emission standards, with China IV imposing stricter requirements on the content of harmful gases in the exhaust, demanding fewer pollutants. Current motorcycles are all China III standard, all adopting electronic fuel injection technology. 2. The China IV emission standard is the national fourth-stage motor vehicle pollutant emission standard. The main pollutants emitted by vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). By using better catalytic converter active layers, secondary air injection versions, and exhaust gas recirculation systems with cooling devices, vehicle emission pollutants are controlled and reduced to levels below the specified standard values.
When I bought a new car, I noticed a big difference between China III and China IV standards. China III was the older emission standard with less strict requirements, producing more smoke and a slight odor when refueling. In contrast, China IV, implemented since 2018, demands higher standards, resulting in cleaner emissions, quieter operation, and better overall performance. Riding a China III bike, I always felt the exhaust smell was stronger, fuel consumption was higher, and the engine noise was louder. Now, with China IV vehicles equipped with better catalytic converters, throttle response is quicker, acceleration is smoother, and it even saves some fuel costs. Although the car price is slightly higher, the ride is much more comfortable, especially in urban stop-and-go traffic, while also reducing pollution and benefiting the environment. Personally, I recommend friends considering a car upgrade to opt for China IV—it’s more worry-free, eco-friendly, and keeps up with policy trends in the long run.
