Difference Between BS4 & BS6 Engine

In the fast-paced world of two-wheelers, the transition from BS4 to BS6 engines has sparked curiosity and questions among riders. What sets these engine standards apart? Are BS6 engines truly more fuel-efficient? And how does it all relate to securing a loan for your dream ride? Join us on this informative journey as we demystify the BS4 vs. BS6 debate, empowering you with the knowledge to make confident decisions about your two-wheeler and financing options when considering a loan on a two-wheeler.

What are Bharat Stage Emissions Norms?

Bharat Stage Emissions Norms (BS) are India's emission standards for vehicles. BS3 (2005) and BS4 (2010) were replaced by BS6 (2020), which significantly reduced pollutants. BS6 norms are stricter, reducing particulate matter (PM) and nitrogen oxides (NOx) emissions to improve air quality and public health.

What is BS4 (BSIV)?

BS4, also known as Bharat Stage 4, refers to the emission standards set by the Indian government for differences between bs4 and bs6 vehicles. It was the prevailing standard before the introduction of BS6 (Bharat Stage 6). The key difference between BS4 and BS6 lies in the level of emissions allowed.

• BS6 engines have significantly stricter emission norms, resulting in lower levels of pollutants released into the environment than BS4 engines.

• This change is intended to lessen pollution and enhance air quality.

You will better know how these standards affect your choice of vehicle and its effects on the environment as we go more into the distinctions between BS4 and BS6.

What is BS6 (BSVI)?

BS6, or Bharat Stage 6, is the latest emission standard implemented in India for vehicles. It signifies a significant leap forward in terms of emission control technology. BS6 engines adhere to more stringent norms, allowing for lower levels of harmful pollutants like nitrogen oxide, particulate matter, and carbon monoxide. The introduction of BS6 aims to improve air quality and reduce the environmental impact of vehicles.

Pollution Emission Norms (BS4 vs BS6)

The shift from BS4 to BS6 brings about a notable change in pollution emission norms. This transition highlights the commitment towards a greener future and underscores the importance of choosing vehicles that comply with the more stringent BS6 standards.

Here is a detailed pollution emission norm for BS4 vs BS6-

 

Norms	BS4 Norms	BS6 Norms
Nitrogen Oxides (NOx)	80mg/km (petrol engines), 250mg/km (diesel cars)	60mg/km (petrol engines), 80mg/km (diesel cars)
Particulate Matter (PM)	25mg/km (diesel cars), not specified for petrol	4.5mg/km (diesel cars), 4.5mg/km (petrol engines)
Sulphur Content in Fuel	50 ppm	10 ppm
Additive Properties	None	Additives imitating lubrication properties of Sulphur
Diesel Particulate Filter (DPF)	Not available	Required
Selective Catalytic Reduction (SCR)	Not available	Required
Real Driving Emission (RDE)	Not paired with BS4	Implemented alongside BS6 norms
Onboard Diagnostic (OD)	Not introduced with BS4	Introduced with BS6
Fuel Compatibility	BS6 engine requires BS6 fuel	BS4 engine using BS6 fuel increases emissions

Difference Between BS4 and BS6 Fuels

Using the appropriate fuel type is crucial for optimal vehicle performance and compliance with emission standards. BS6 fuel is required for BS6 engines, as BS4 fuel may lead to increased emissions and less efficient combustion in BS6 engines. The adoption of advanced emission control technology in BS6 fuel helps in achieving cleaner combustion and reduced pollutant emissions. So switch to BS6 fuel to support a greener and more sustainable future.

Read below to know more about BS4 and BS6 difference-

Difference Metrics	BS4 Vs BS6 Fuel	BS6 Vs BS4 Fuel
Sulphur Content	Higher (50ppm)	Lower (10 ppm)
Nitrogen Oxide (NOx) Content	Not specified	Reduced by 70% (diesel), 25% (petrol)
Lubrication Properties	Relies on Sulphur for lubrication	Additives imitate the lubricating properties of Sulphur
Fuel Availability	Widely available	Dispensed across all petrol pumps from April 2020
Compatibility	Suitable for BS4 engines	Required for BS6 engines
Environmental Impact	Higher emission of pollutants	Reduced emission of pollutants
Impact on Vehicle Performance	May result in less efficient combustion and higher emissions	Enables efficient combustion and reduced emissions
Emission Control Technology	May lack advanced emission control systems	Incorporates advanced emission control systems

What are BSI, BSII, BSIII, BSIV and BSVI Emission Norms?

BSI, BSII, BSIII, BSIV, and BSVI are standards set by the government to control pollutants emitted by vehicles. They specify the maximum amount of harmful gases that can be released from a vehicle's exhaust pipe.

• BSI (Bharat Stage I) was the first set of norms introduced in the year 2000. It aimed to regulate carbon monoxide, hydrocarbons, and oxides of nitrogen emissions from vehicles.
• BSII (Bharat Stage II), implemented in 2001, tightened the limits on emissions to reduce air pollution further.
• BSIII (Bharat Stage III), enforced in 2005, set stricter standards to cut down on pollutants like sulphur dioxide from vehicle exhausts.
• BSIV (Bharat Stage IV), introduced in 2017, aimed to significantly decrease nitrogen oxides and particulate matter emissions.
• BSVI (Bharat Stage VI), rolled out in 2020, is the current standard and is designed to drastically reduce pollutants such as sulphur dioxide, nitrogen oxides, and particulate matter. It aligns with global standards to improve air quality.

These norms play a crucial role in reducing air pollution and promoting cleaner technologies in the automotive sector, contributing to environmental protection and public health improvement.

Impact of BS6 on CNG Cars:

The Impact of BS6 on CNG Cars is as follows:

• Lower Emissions: BS6 norms have stricter emission standards, reducing pollutants released by CNG cars compared to BS4.

• Enhanced Technology: CNG cars with BS6 compliance incorporate advanced catalyst technology to further reduce harmful emissions.

• Improved Fuel Efficiency: BS6-compliant CNG cars often offer better fuel efficiency, optimising the utilisation of natural gas as a clean fuel source.

• Advanced Onboard Diagnostics: BS6 standards include the implementation of Onboard Diagnostics (OBD), enabling better monitoring and diagnosis of CNG car performance.

• Enhanced Air-Fuel Ratio Control: BS6 norms require precise control over the air-fuel mixture, resulting in improved combustion efficiency and reduced emissions.

• Compatibility with BS6 Fuel: CNG cars designed for BS6 compliance are compatible with the lower sulphur content and improved quality of BS6 fuel.

• Environmental Benefits: CNG cars meeting BS6 norms contribute to reducing air pollution, promoting cleaner and greener transportation.

List of BS6 Bikes/Two-Wheelers/Scooters in India

Here is the list of BS6 bikes/two wheelers/scooters in India that are currently available in the market:

BS6 Two-Wheelers:

Model	Engine	Power	Torque	Fuel Efficiency	Emissions
Hero Splendor Plus	97.2 cc	8.02 PS	8.05 Nm	55 kmpl	BS6
Hero Destini 125	124.6 cc	9.09 PS	10.4 Nm	56 kmpl	BS6
Hero Glamour	124.7 cc	10.7 PS	11 Nm	69 kmpl	BS6
Hero HF Deluxe	97.2 cc	8.36 PS	8.05 Nm	88.5 kmpl	BS6
Hero Xtreme 160R	163 cc	15.2 PS	14 Nm	40 kmpl	BS6
Hero XPulse 200 4V	199.6 cc	17.8 PS	16.45 Nm	35 kmpl	BS6
Hero Maestro Edge 125	124.6 cc	9 PS	10.4 Nm	51 kmpl	BS6
Hero Pleasure Plus	110 cc	8 PS	8.7 Nm	50 kmpl	BS6

BS6 Scooters

Model	Engine	Power	Torque	Fuel Efficiency	Emissions
Hero Maestro Edge BS6	109.15cc	8.4 HP	9.5 Nm	45 kmpl	BS6 compliant
Hero Pleasure BS6	109.15cc	8.4 HP	9.5 Nm	45 kmpl	BS6 compliant
Hero Destini BS6	124.7cc	8.7 HP	10.2 Nm	45 kmpl	BS6 compliant
Hero Duet BS6	109.15cc	8.4 HP	9.5 Nm	45 kmpl	BS6 compliant

Conclusion

BS4 and BS6 fuels differ in their sulphur content, emission control technology, and impact on vehicle performance. By adhering to BS6 standards, you contribute to cleaner air and a greener future.

If you're planning to purchase a bike and need a Two Wheeler Loan, consider using our Bike Loan Calculator to estimate your monthly payments before applying. We at Hero FinCorp offer attractive Bike Loan interest rates and flexible repayment terms. Apply now!

Frequently Asked Questions:

1. What is the power difference between BS4 and BS6?

The power difference between BS4 and BS6 varies depending on the vehicle model and engine technology. Due to improved combustion efficiency and advanced technologies, BS6 engines offer better power output and performance.

2. Is BS6 more fuel efficient than BS4?

While BS6 engines are designed to be more environmentally friendly and compliant with stricter emission norms, their fuel efficiency may not be better than BS4 engines. Fuel efficiency depends on various factors, including engine design, vehicle weight, driving conditions, and individual driving habits.

3. What is the full form of BS4?

The BS4 full form is "Bharat Stage 4." It refers to the fourth stage of emission standards set by the Indian government to regulate air pollutants from vehicles and engines.

4. What is the full form of BS6?

The BS6 full form is Bharat Stage 6. It is an emission norm set by the Government of India to regulate the permissible limits for pollutants emitted by internal combustion engines in vehicles.