How to Check Compression Ratio on a Car Engine

If you’re like most drivers, you probably take your car’s engine performance for granted. But if your car’s engine is not running at its best, it can lead to decreased fuel economy and increased emissions. In this article, we’re going to teach you how to check the compression ratio on a car engine so that you can keep it running optimally.

What is the Compression Ratio?

Compression ratio is the measure of how much air is squeezed out of a mixture as it is compressed. In automotive engines, compression ratio is an important factor in fuel economy and emissions. The higher the compression ratio, the more air is compressed into the engine, resulting in increased efficiency and power.

How to Check Compression Ratio on a Car Engine

If you’re looking to get a general idea of your car’s compression ratio, you can check it with a compression tester. A compression tester plugs into the diagnostic port on your car and calculates the engine’s compression ratio.

Alternatively, you can check your car’s compression ratio using an online calculator like this one: Once you have your compression ratio, you can compare it to manufacturer guidelines to see if you’re running too high or low.


In this article, we will be discussing how to check compression ratio on a car engine. This is important information for anyone who owns or works on cars, as it allows you to troubleshoot and fix problems with your car’s engine. By understanding how to check compression ratio, you can save yourself time and money by avoiding costly repairs down the road.

DynoCar is the best place to find information on all things cars, whether it be a car buying guide or how to change your oil. We’ve made finding and staying in touch with car information easy and fast.



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