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Advantages of 4 Stroke Engines


Guest Post Submitted to Our Staff

The debate over which engine is better – 4 stroke engine or 2 stroke engine – has been going on for decades. Each of these two engines has its own set of advantages and disadvantages. However, 125cc 4 stroke engine has been gaining massive popularity due to the power it produces and the fuel economy it offers. Over the years, the technologies concerning these two kinds of engines have evolved to fill the significant gaps between the two. In this article, we will discuss some of the significant advantages of 4 stroke engines and why they are more preferred for most on-road vehicles. 

Fuel Economy

In the 2 stroke engine, the technology used leads to more fuel consumption as it expels the fuel even before it is processed and burned. In the 4-stroke engines, there are dedicated strokes for exhaust, consumption, and power. The crossover or ratio for fuel to exhaust is significantly reduced for this reason. It helps in ensuring better fuel economy for the 4 stroke engines and is further aided by the use of direct injection system

Higher Torque

The way the 4 stroke engines burn their fuel has a lot to do with how it can generate higher torque. Most of the 4 stroke engines generate higher torque than its counterpart at low RPM. It cannot be denied that the 2 stroke engines enjoy higher RPM, but it cannot make as much torque as the 4 stroke engines. The way the fuel is burned in the 4 stroke engine ensures that the maximum power is transferred to the crankshaft. 


The USP of the 2 stroke engines is its higher RPM. It requires the engine to rev at a very high speed, and more times it goes around, the faster it gets worn out. Every engine has a lifecycle in terms of how many revolutions it can sustain under the test conditions. The fact that the 125cc 4 stroke engine can make more torque under low RPM is what makes it one of the most preferred engines these days for any vehicle. The low RPM of the 4 stroke engines greatly enhances its lifecycle. 

Clear Emissions

One of the primary reasons the 2 stroke engines aren’t preferred is because of its dirty emissions. The crankcase in the 2 stroke engine is lubricated by the combination of fuel and oil injection. When the engine burns the fuel, oil is consumed as well. It leads to 2 stroke engine vehicles running dirty and has a higher level of emissions. The 4 stroke engines have a separate combustion chamber and oiling system. It ensures that the engine only burns the fuel, and the oil is treated separately. Many of you might have witnessed an old car churning out vast amounts of blue soot and emissions. It happens when the engine is burning gasoline and oil at the same time. 

The 4 stroke engines are widely used for the reasons mentioned above. They last longer, have better performance, and impact the environment less than its counterpart. The technology surrounding the functioning of the engines is continually improving. It has helped in making the 4 stroke engines of today much better than what it was a few years back. 

Tim Esterdahl

Automotive Journalist Tim Esterdahl has been a lover of trucks and SUVs for years. He has covered the industry since 2011 and has pieces in many national magazines and newspapers. In his spare time, he is often found tinkering on his '62 C10 pickup, playing golf, going hunting and hanging out with his wife and kids in Nebraska.

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