What are the differences between National V and National VI?

[VanJayce]

The differences between National V and National VI are: 1. Different carbon monoxide emission levels: National V's carbon monoxide emission is 1000 milligrams; National VI's carbon monoxide emission is 700 milligrams. 2. Different emission limits: National V's emission limit is 0.0045 grams per kilometer; National VI's emission limit is 0.25 grams per kilometer. 3. Different full names: National V's full name is the National Fifth Stage Motor Vehicle Pollutant Emission Standard; National VI's full name is the National Sixth Stage Motor Vehicle Pollutant Emission Standard. Both National V and National VI regulate the content of harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and soot emitted from vehicle exhaust.