What is the Difference Between National 5 and National 4 Vehicles?
2 Answers
The differences between National 5 and National 4 are: 1. Different nitrogen oxide emission standards: The National 5 nitrogen oxide emission standard is 0.18 grams per kilometer; the National 4 nitrogen oxide emission standard is 0.25 grams per kilometer. 2. Different particulate matter concentration emission standards: The National 5 particulate matter concentration emission standard is 0.0045 grams per kilometer; the National 4 particulate matter concentration emission standard is 0.025 grams per kilometer. 3. Different non-methane hydrocarbon emission standards: The National 5 non-methane hydrocarbon emission standard is 0.23 grams per kilometer; the National 4 non-methane hydrocarbon emission standard is 0.3 grams per kilometer.
The main difference between China 5 (National 5) and China 4 (National 4) vehicles lies in their emission standards, with China 5 being the fifth stage and China 4 the fourth. China 5 imposes stricter limits on pollutants, significantly reducing emissions of nitrogen oxides (NOx) and particulate matter (PM). I recall that the NOx limit was lowered by approximately 30%, which helps reduce smog and respiratory issues in urban areas. China 5 vehicles are also often equipped with advanced filters like DPF (Diesel Particulate Filter), making exhaust treatment more efficient. From a usage perspective, China 5 was fully implemented in 2017, while China 4 was introduced in 2013, so newer China 5 vehicles benefit from more advanced technology. On automotive forums, I've seen discussions about older China 4 vehicles potentially facing restrictions in some major cities, which could limit driving freedom. The upgrade in standards primarily promotes environmental protection, making cars cleaner. I recommend prioritizing China 5 vehicles when choosing a car—it saves money and contributes to environmental protection, aligning well with the current trend toward new energy vehicles.
