Which type of car emits more pollution, diesel or gasoline?

5 Min Read
Which type of car emits more pollution diesel or gasoline

Many individuals still cannot afford an electric or zero-emission vehicle despite the ongoing war against combustion engines. Which internal combustion engine vehicles produce less pollution, then?

Every car powered by a combustion engine will eventually become extinct. Those are the administrations’ intentions, at least.

Which type of car emits more pollution diesel or gasoline

But until recently, diesel cars were targeted explicitly as more polluting than gasoline-powered vehicles. What is the reality behind this? That is the subject of our analysis.

Emissions of CO2

We all know that a gasoline engine starts at a disadvantage because it typically uses more fuel than a diesel engine.

Beyond that, carbon dioxide (CO2) and nitrogen oxides (NOx), among other gases and particles, are produced during the combustion or mixing of air and fuel inside an engine cylinder.

A diesel produces higher NOx but less CO2 and solid particles.

While not toxic to the human body, the first of them, CO2, is a greenhouse gas that hurts the environment. This is because it is exceedingly difficult to remove from the atmosphere, which causes heat as its concentration rises.

Diesel engines produce less CO2 than gasoline engines do. This is caused by the fuel’s constitution, as diesel has more carbon atoms than other powers.

NOx discharges

In contrast to CO2, nitrogen oxides are seriously detrimental to human health. These are produced as a result of incomplete combustion, which always takes place in a combustion engine.

As a result of prolonged exposure to these harmful particles, cancer may develop. Additionally, it causes the ozone layer to be destroyed and the signature urban pollution cloud.

Nitrogen oxides cause a significant portion of the pollution plumes formed over cities.

When the mixture is poor because of too much oxygen, their presence in the gases that emerge from burning increases. Something that the electronic components of automobiles frequently compel to lower fuel consumption

Due to the more significant pressures reached by diesel engines, NOx is typically more prevalent in these engines.

What pollution-reducing features come with automobiles?

Manufacturers had to create equipment to enable them to comply when the European Union and other authorities tightened their restrictions on pollution emissions from vehicles. These are listed below:

Catalytic converter

This device breaks down NOx by chemically converting hydrocarbons into water and carbon monoxide (CO) into CO2 by circulating these gases at high temperatures (between 400 and 800 C) before and during the process. In modern gasoline engines, a variation called a NOx catalyst-accumulator is employed.

EGR valves

They are virtually universally present in diesel vehicles and are becoming more frequent in gasoline-powered cars. Its primary purpose is to lower NOx emissions, but it also results in lower levels of CO2 and other harmful particles.

Anti-particulate filter

The anti-particulate filter’s job is to minimize solid particle and NOx emissions from a diesel engine’s combustion by about 99%.


AdBlue is the most well-known brand name for an additive whose primary function is to cause a chemical reaction that releases ammonia.

The ammonia then encourages the breakdown of NOx into free nitrogen and water vapor, which are eventually released through the exhaust, resulting in a significant decrease in pollutant emissions into the atmosphere.

In light of this information and the facts about contemporary automobiles, we can claim that a diesel vehicle generally provides superior results in terms of CO2 and solid particle emissions, even though its nitrogen oxide emissions are higher (NOx).

In other words, it is neither true nor possible to declare categorically that a diesel vehicle pollutes more than a gasoline vehicle. The car in issue and the age of its mechanics will be important factors.

Share this Article
Leave a comment