What are the differences between the Tharu National 5 and National 6 standards?

[Oliveira]

The difference between the Tharu National 5 and National 6 standards lies in the exhaust emission system: the Tharu National 5 has higher exhaust emissions, while the Tharu National 6 has lower exhaust emissions. After the implementation of the National 6 standard, vehicle exhaust emissions will be reduced by more than 50% compared to the National 5 standard, with carbon monoxide, hydrocarbons, and non-methane total hydrocarbon emissions decreasing by 50%, and nitrogen oxide emissions decreasing by 42%. The National 6 vehicle emission standards are stricter. The Tharu has a body length of 4453mm, a width of 1841mm, a height of 1632mm, a wheelbase of 2680mm, and a height of 1620mm excluding the roof rack.