What is difference between bs4 and bs6 ?

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Accepted Answer

BS4 and BS6 refer to Bharat Stage Emission Standards for vehicles in India, with BS6 being the latest and more stringent.

BS4 refers to Bharat Stage 4 emission norms, while BS6 refers to Bharat Stage 6 emission norms.
BS6 is more stringent than BS4 in terms of the permissible levels of pollutants such as nitrogen oxides, particulate matter, hydrocarbons, and carbon monoxide.
BS6 compliant vehicles are required to have advanced emission control technologies such as selective catalytic reduction (SCR) and diesel particulate filters (DPF).
BS6 norms were implemented in India from April 2020, while BS4 norms were in place before that.
BS6 compliant vehicles are generally more expensive than BS4 vehicles due to the advanced technologies required to meet the stricter emission standards.

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