9 January 2023

Fuel injection vs Carburetor | Difference

There are two different methods of delivering fuel to an engine. One is a fuel injection, and another is a carburetion. Both methods can be used to power an engine, but fuel injection is the most popular choice for many reasons. The carburetor mixes the fuel and air before it enters the engine. This can be done by venturi, which narrows the airflow and injects fuel into the air stream. The mixture is then drawn into the engine and then burned.

In contrast, fuel injection injects the fuel directly into the intake manifold or cylinder. In the cylinder, fuel is combined with air and drawn into the engine. Thus, it enables more accurate control of air/fuel ratio, which leads to enhanced fuel efficiency, improved power, and lower emissions. Fuel injection is much less maintenance than a carburetor, making it the preferred choice in modern engines. So, how do these two systems work? What distinguishes them, and what are their respective qualities and vices? Let us check the fuel injection vs carburetor difference.

Read more about advantages and disadvantages of carburetor

Difference between fuel injection vs carburetor


The carburetor has been phased out of the automobile industry, with fuel injection taking place and gaining dominance. For starters, it can not be used in diesel automobiles. Fuel injection is available in both electrical and mechanical forms. Thus, it can be used for both diesel and petrol vehicles.  


A fuel injection system with electronically controlled fuel induction can continually adjust the fuel flow to the cylinders, resulting in improved performance. A carburetor suffers from shifting air pressure and fuel temperature and cannot measure the correct air-fuel ratio. 

Fuel Economy

A fuel injection system accurately delivers fuel in the right of fuel and may be tweaked based on numerous characteristics, resulting in less fuel waste and improved fuel economy. A carburetor can not adjust the fuel ratio based on engine circumstances. 


The only parameter where a carburetor outperforms fuel injection. Carburetors are simple to clean and rebuild. Repairing a fuel injection system requires skilled professional assistance or a costly replacement. 

Frequently Asked Questions: Fuel injection and Carburetor

1. Carburetor or fuel injection: Which is better?

The answer is that it truly depends on how much you drive your car and how much money you want to spend into it. Car manufacturers stopped carburetors in the 1980s due to advances in fuel injection technology. However, it is also more costly.

2. Does fuel injection more reliable than carburetor?

A good fuel injection system is often more accurate than a carburetor. This technology delivers the exact quantity of fuel required, regardless of the conditions, resulting in improved reliability and fuel economy. Because a carburetor cannot compensate for the fuel intake ratio, it needs to be more precise.

3. Why carburetors are not used anymore?

Because fuel injection technology has much more evolved thus, the usage of carburetors has decreased significantly.