What do National V and National VI mean?
3 Answers
National V and National VI refer to China 5 and China 6 emission standards respectively. The China 6 emission standard is 40% to 50% stricter than China 5. The differences between China 5 and China 6 are defined by: 1. The CO emission limit for China 5 is 1000mg per kilometer, while for China 6 it's 700mg per kilometer; 2. Under China 5, diesel and gasoline vehicles had different emission standards, but China 6 adopts a fuel-neutral approach where all vehicles have the same emission limits regardless of fuel type; 3. The sulfur content limit for China 5 is 10ppm with manganese content limited to 2mg per liter, whereas China 6 reduces these to 5ppm sulfur content and 1mg manganese per liter.
National V and National VI refer to China's national emission standards, simply put, they are China 5 and China 6. As an ordinary car owner, I was torn about this when buying a car before. China 5 is the fifth-stage emission standard, implemented around 2017, and the car prices are relatively cheaper. China 6 is the sixth-stage standard, introduced in 2019, with stricter emission limits, significantly reducing pollutants like particulate matter and nitrogen oxides. Last year, I switched to a China 6 car, which runs smoothly and is more fuel-efficient. Nowadays, in many cities, China 5 cars might face driving restrictions, so it's better to choose a China 6 car when buying. China 6 is further divided into China 6a and China 6b, with 'a' being a transitional phase and 'b' being stricter. If buying a used car, China 5 models are generally cheaper, but in the long run, maintenance might be more troublesome. My suggestion is to prioritize China 6 cars—they can last longer and are more environmentally friendly. For regular maintenance, just pay attention to fuel quality.
China V is China 5, and China VI is the Roman numeral representation for China 6. I've been into cars for years and know these well. China 5 was the standard introduced in 2017, while China 6 is stricter, reducing the emission limits of harmful gases, such as a roughly 20% decrease in PM2.5. This affects the engine design of cars, and manufacturers have added more advanced purification systems. I remember when modifying cars, China 6 vehicles came with better catalytic converters—performance was decent but costs were higher. In the long run, the upgrade in standards promotes the development of electrification. The rise of new energy vehicles now is also influenced by this. I often keep an eye on new car models, and China 6b is the future mainstream with stronger pollutant control. If you use your car frequently, China 6 vehicles are easier to maintain—just avoid low-quality fuel. If you're thinking of upgrading, have a professional shop check the emission system. This knowledge is crucial in car buying guides.
