What are the differences between National 4 and National 5?
1 Answers
The differences between National 4 and National 5 are as follows: 1. Different meanings: The National 4 emission standard is the fourth stage of China's motor vehicle pollutant emission standards, while the National 5 emission standard is the fifth stage, known as the 'National 5 standard'. Compared to National 4, National 5 is more stringent, resulting in fewer pollutants emitted, making it more environmentally friendly. 2. Different standards: Compared to National 4, the new National 5 standard reduces nitrogen oxide emissions by 25% for light-duty vehicles and by 43% for heavy-duty vehicles. 3. Different symbols: The symbol for National 4 is IV, while the symbol for National 5 is V.