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BS4 Diesel Cars in India: Everything You Need to Know


If you are looking for an article on BS4 diesel cars in India, then this is the correct one to read. Here we’ll discuss BS4 diesel cars, which are diesel-powered vehicles that comply with the Bharat Stage 4 emission standards. These standards were introduced in India in 2010 and are more stringent than the previous BS3 standards. BS4 diesel cars emit less particulate matter and nitrogen oxides, two major pollutants that contribute to air pollution.

BS4 Diesel Cars in India

BS4 Diesel Cars in India: Market Share

BS4 diesel cars once commanded a significant share of the Indian car market. However, their popularity has declined in recent years due to the rising cost of diesel fuel and the increasing awareness of the environmental impact of diesel vehicles. In 2022, BS4 diesel cars accounted for only about 10% of the new car sales in India.

  • Maruti Suzuki Vitara Brezza
  • Maruti Suzuki Ciaz
  • Ford Endeavour
  • Honda Civic
  • Volkswagen Polo
  • Toyota Innova Crysta
  • Volkswagen Tiguan

BS4 Diesel Cars in India: Advantages and Disadvantages


  • BS4 diesel cars are more fuel-efficient than petrol-powered cars. This can be a significant advantage for drivers who travel long distances frequently.
  • BS4 diesel cars are also more torquey than petrol-powered cars, making them better suited for towing and off-road driving.
  • BS4 diesel cars are relatively inexpensive to maintain.


  • BS4 diesel cars are more expensive to purchase than petrol-powered cars.
  • BS4 diesel cars emit more particulate matter and nitrogen oxides than petrol-powered cars.
  • BS4 diesel cars can be noisy and smelly.

BS4 Diesel Cars in India: Ban in Delhi

In 2023, the Delhi government imposed a ban on the plying of BS4 diesel cars in the city. This ban was implemented to reduce air pollution in Delhi, which is one of the most polluted cities in the world. The ban applies to all BS4 diesel cars, including private vehicles, taxis, and commercial vehicles.

What is BS4?

BS4 stands for Bharat Stage 4, which is an emission standard set by the Indian government for vehicles. It specifies the maximum permissible limits for pollutants such as carbon monoxide, nitrogen oxides, and particulate matter that can be released by vehicles. BS4 was implemented in India in 2010 and was replaced by BS6 in 2020 1.

What is the difference between BS4 and BS6?

BS4 and BS6 are both emission standards set by the Indian government for vehicles. The main difference between them is the type of fuel used. BS6 engines use fuel that contains less sulfur, which results in fewer harmful emissions and pollutants. In contrast, BS4 engines use fuel with real sulfur, which leads to more harmful emissions and pollutants being emitted 1.

The BS6 norms have been made more stringent than BS4 norms to reduce the amount of pollutants being emitted from vehicles. For example, the maximum permissible limit of nitrogen oxides (NOx) emissions from a petrol vehicle under BS6 norms is 60mg per km, whereas under BS4 norms, it was 80mg per km. Similarly, the particulate matter (PM) limit is set at less than 4.5 mg per km for petrol vehicles under BS6 norms, whereas under BS4 norms, it was 25mg 23.


Some of the benefits of using BS6 engines are:

  1. Eco-friendly: BS6 engines are more environmentally friendly than BS4 engines. They emit fewer pollutants and harmful emissions, which can help reduce air pollution levels 145.
  2. More refined: BS6 engines are manufactured to be more refined by incorporating the latest technology standards. This results in a smoother and more efficient engine performance 1.
  3. Better engine performance: BS6 engines come with enhanced motors where the sulfur levels are reduced. This results in better throttle response and fuel efficiency 1.
  4. Convenient features: Several companies have added more convenient features along with the BS6 transformation 1.
BS6 Vs BS4

However, there are also some disadvantages of using BS6 engines, such as higher costs due to safety standards resulting in a price hike 1.

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