Difference between BS III and BS IV vehicles.

 

1. BSIII is Compulsory for all India, while BS4 is compulsory for all metro cities

2. Most petrol powered passenger cars in India have already converted to BSIV years

3. BS is basically the emission standards given by Government of India to regulate the air pollutants coming from internal combustion engine.

      4.The difference between BS3 and BS4 as follow as BS3

Carbon monoxide 2.30g/km

HC 0.20 g/km

NOX 0.15g/km

But in BS4

Carbon monoxide 1.00 g/km

HC 0.10 g/km

NOX 0.08 g/km   (BS4 Vehicles is costly than BS3)

5. BS means Bharath Stage BS-III and BS-IV are environment standards for vehicle emissions.

6. Bharath stage III norms must have been enforced across the country since October 2010.  From April 2010, Bharat Stage IV emission norms are in place 13 major cities in India.

7. Bs4 has turbocharger with intercooler. Also it has common rail injection system controlled by electronic control unit.

8. Bs3 has rotary type injection system. Intercooler is optional.

9. Bs4 Engine is very good and less polluting