10 Best Compression Tester of 2021 – Reviews And Buying Guide

You call yourself a professional mechanic, yet you don’t have the best compression tester; I wonder how you survive without them in this 21st century. You may lose customers if you lack such tools. How can I get the best engine compression tester? Worry no more because this article will answer all your questions today.

It isn’t easy to choose something that you don’t even have a single knowledge. Many brands are in the market producing different tools with unique features that may confuse you. Therefore, to curb such situations, this article provides you with comprehensive information that can help you develop a live decision on compression testers.

5 Best Compression Tester: Editor Recommended

Everyone deserves the best diesel compression tester for excellent and quality performance. Let us get into the business in this compression tester review.

Top 10 Best Compression Tester Reviews:

1. INNOVA 3612 Compression Tester – 4 Piece Kit

INNOVA 3612 Compression Tester - 4 Piece Kit
  • Designed to perform compression...
  • Properly rated fuel hose and brass...
  • Works on motorcycle ATV snowmobile...

INNOVA is among the best engine compression tester brands known for producing quality products such as mechanical testers, electric testers, and many others. INNOVA 3612 Compression Tester is their recent compression tester with a futuristic design and rugged construction.

This tool is ideal for identifying burnt valves, broken piston rings, damaged pistons, etc. more so, it features dual-calibrated scales that can register up to 2100kPa and 300 PSI. The tool comes with other accessories such as a side-release valve and rubber hose to make work easier.

Furthermore, the tool offers three adapters of different sizes, i.e., 14mm, 12mm, and 18mm, for various tasks. It is a versatile compression tester mainly for cars, but you can also use it in different sectors like ATVs, motorcycles, marine applications, and snowmobile.

Moreover, it features a quick-disconnect fitting to enable you to install and use the tool efficiently. You can also use it with anything that can accommodate a spark plug. Besides, it comes with a 1-year warranty from the company.

Despite being the best engine compression tester, it doesn’t come with a storage case. Therefore you should be careful to prevent it from damages and loss.


  • It is affordable
  • Lightweight
  • Quick connect and disconnect fitting
  • Solid construction


  • Doesn’t come with a storage case

Buy on Amazon

 2. OTC 5605 Deluxe Engine Compression Tester

OTC 5605 Deluxe Compression Tester Kit with Carrying Case
  • OTC's Deluxe Compression Tester Kit...
  • Kit includes the deep well...
  • Adapters work on both flat and...

You will not miss quality products from OTC Company. It is also known for its quality products that don’t disappoint. Many customers affirm that OTC’s products remain to be the best because of their quality, easy installation, and use of products as well as their affordable prices. OTC 5605 Deluxe Compression Tester is one of the perfect tools for handling issues in gasoline engines.

It comes with a standard design featuring a quality adapter compatible with tapered seat and flat plugs. This compression tester will serve for an extended period due to its corrosion-resistant nickel-plated coating. Besides, extra-long 25″ hose gauge to enable you to carry out your task without a hassle.

It can deliver pressure up to 2100kPa and 300 PSI and has a ¼-inch quick connector. Therefore, you should check the size of the spark before buying the tool. It is advisable to get a car-sized plug. Besides, it is a professional tool that is suitable for both larger engines and motorcycles.

Furthermore, you can use OTC 5605 Deluxe Compression checker for bad valve detection in your car; it can correctly identify the problem. Above all, it comes with a storage case for easy storage and movement.


  • Storage case
  • Quick couple
  • Genuine price
  • Lightweight


  • Low-quality gauge

Buy on Amazon

3. OTC 5606 Gasoline Engines Compression Tester

OTC 5606 Compression Tester Kit for Gasoline Engines
  • OTC's Compression Tester Kit is...
  • Includes: 12-inch flex 14mm...
  • Professional quality, dual scale...

OTC 5606 Compression Tester Kit is another best compression tester for money tool from the OTC brand. It is also suitable for gasoline engines. However, it is versatile as you can use it in other engine applications like import, domestic, motorcycle, small engines, and marine. It features a 14-inch long reach and standard flex hose.

The tool comes with three adapters of different sizes, i.e., 10mm, 14mm, and 12mm. These adapters are ideal for both tapered and flat seat plugs. Besides, it offers a quality 2-1/2″ dual scale gauge making it perfect for professional applications. Its pressure provision can also go up to 2100 kPa and 300 PSI.

Furthermore, its flex hose is 25″ extra-long for standard performance. Its corrosion-resistant nickel-plated coating makes the tester long-lasting and heavy-duty. Also, it comes with a sturdy storage case for easy storage and carrying of the tools.

Its exterior design is smooth, making it the best compression gauge kit in the market. However, it is quite expensive.


  • Storage case
  • Versatile
  • Lightweight
  • Durable


  • Expensive

Buy on Amazon

4. Lisle 20250 Compression Leak Down Tester

Lisle 20250 Compression Tester
  • Package Dimensions: 37.083 cms (L)...
  • Product Type: Electromechanical...
  • Package Quantity: 1

If you are looking for another good compression tester tool that will make you work like a pro, then Lisle 20250 Compression Tester can be your best choice. It can allow you to accurately and quickly handle gasoline engines. Besides, it features a firm stop and detachable valve for its longevity.

Furthermore, just like other best engine compression tester, its gauge can register up to 2100kPa and 300 PSI and is compatible with 18mm and 14mm thread sizes. Moreover, it is a professional tool that can work on both larger engines and motorcycles.

This tool full of sturdy and finest materials for strength and durability you may need when working. However, these strong materials also increase its lifespan; it will serve you for decades.

It also comes with superior functionality that will enable you to do any job quickly. Lisle 20250 Compression Tester is a reliable tool that will fully satisfy you. Unfortunately, it has no storage and carrying case, but you can take and store it easily.


  • Durable tool
  • Easy to use
  • It is not heavy
  • Compatible with 18mm and 14mm thread sizes


  • Lacks a storage case

Buy on Amazon

5. Shankly Harbor Freight Compression Tester

Shankly Compression Tester (Professional Grade)
  • RELIABLE AND EASY: compression...
  • EASY AND FLEXIBLE: engine...
  • QUICK RE-TESTING: compression...

Shankly Compression tool kit tester is another perfect choice that you can consider. It can produce reliable and accurate readings. More so, the tool comes with angled and straight fitting for comfortable and better connectivity; this allows you to take measurements from both sides to get accurate readings.

Furthermore, it features multiple spark plug adapters for different plug depths and types. This art will enable you to have numerous measurements in various vehicles. More so, it features two rubber cones near the end of the hose to protect it and deliver accurate measurement of the pressure

The rubber is long-lasting as it cannot wear out quickly. However, there is also a dual-scale choice. The scale enables you to view exact readings; its optimum pressure provision is 2100kPa and 300 PSI.

With the Shankly Compression tool kit tester, you will be able to carry out quick re-testing with the aid of its side-release valve. Besides, with this tool, there will be no need for removing and disconnecting secondary equipment like steering, power brakes, various components, and air conditioning.

Its compression gauges include; 18mm and 14mm sturdy short adapter. The tool can work on imported and domestic cars and trucks featuring gasoline engines.


  • Easy to use
  • Reliable readings
  • Quick re-testing
  • Durable


  • A bit heavy

Buy on Amazon

6. Actron CP7828A Professional Long Reach Compression Tester

Actron CP7828A Professional Compression Tester Kit
  • Actron's Professional Compression...
  • Convenient push-button side release...
  • Gauge features a 2-1/2 inch...

Besides its position on the list, Actron CP7828A Compression Tester Kit can perfectly have your job done if you can use to accurately detect burnt valves, broken piston rings, damaged head gaskets, etc.

More so, the tool features a 2-1/2″ diameter, and its pressure provision can go up to 2100kPa and 300 PSI. The device comes with a storage kit for your tools; also, it offers you an easy-to-read white front face.

Furthermore, the tool offers multiple adapters of different sizes, i.e., 10mm, 14mm, 12mm, and 18mm normal spark plug threads and, finally, a 14″ extended reach for various tasks.  It is a versatile compression tester making it suitable for domestic and foreign vehicles, ATVs, motorcycles, small engines, marine applications, and snowmobile.

It also comes with other useful accessories like a push-button side-release valve with a single-touch operation that allows you to test without the need for disconnecting tests repeatedly.

Moreover, Actron CP7828A Compression Test Kit features grease and oil resistant hose to extend its lifespan. Also, it has a solid brass material responsible for its longevity. The hose is also 17 inches long, high-pressure, and flexible. Above all, it comes with manual instructions to guide you.


  • Quick connecting and disconnecting
  • Versatile
  • Multiple adapters
  • It is not heavy


  • Low performance

Buy on Amazon

7. Actron CP7827 Diesel Compression Tester

Actron CP7827 Compression Tester Kit
  • Actron's Compression Tester Kit...
  • Convenient push-button side release...
  • Gauge features a 2-1/2 inch...

Actron CP7827 Compression Tester Kit is another compression tester that functions almost the same as the Actron CP7828. It is a suitable tool for identifying damaged head gaskets, burnt valves, damaged piston rings in any engine.

Therefore, you can use this best engine compression tester in domestic and foreign vehicles, ATVs, motorcycles, firm/fleet, and many others. It features a push-button side-release valve that allows you to test without disconnecting tests repeatedly.

More so, this best compression tester for money comes with a 2-1/2″ diameter with metric and standard scales of 0-2100kPa and 0-300 PSI. The tool also offers you an easy-to-read white front face coming with a storage kit for the safety of your devices.

It also has a 17-inch, flexible, high-pressure, grease and oil resistant hose with a quick-release connection and disconnection at the tool for faster and more comfortable use. Besides, its 18mm and 14mm ends are compatible with many thread spark plug sizes.

Also, it has a 14mm long-range adapter that is suitable for many modern vehicles containing deeply-recessed spark plugs. For better results, remember to tighten adapters to prevent unnecessary adapter separation when you disconnect it from the head of the cylinder. Above all, it comes with compressive instructions and a 1-year warranty.


  • 1-year warranty
  • Also suitable for modern vehicles
  • Manual instructions
  • Lightweight


  • No storage bag

Buy on Amazon

8. INNOVA 3615 OHC Compression Tester Plus

INNOVA 3615 OHC Compression Tester Plus
  • Designed to access recessed spark...
  • Side-release valve allows repeated...
  • Includes 15-inch high pressure hose...

INNOVA 3615 OHC Compression Tester is another best compression gauge option for you. The tool can enable you to perform compression tests even in intricate spark plug holes. It features multiple adapters, i.e., 12mm, 10mm, 18mm, and 14mm, to handle spark plugs of different sizes.

Furthermore, the engine compression tester comes with a 15-inch high-pressure hose covered with stainless steel for its longevity. Also, the tool features a side-release valve that allows you to test without the need for disconnecting tests repeatedly.

More so, INNOVA 3615 OHC Compression Tester is versatile in that you can use it in boats and many other marine applications. Besides, its 12mm and 10mm adapters make the tool suitable on ATVs and motorcycles, and a 14mm adapter long reaches the device compatible with different spark plugs.

Moreover, it also comes with an 18″ extended reach adapter compatible with all compression testers.


  • Made from durable stainless steel
  • Easy to operate
  • Quite cheap
  • Lightweight; weighs about 1.8 pounds.


  • Doesn’t come with a storage case

Buy on Amazon

9. Mityvac MV5532 Compression Tester Autozone

Mityvac MV5532 Digital Compression Test Kit
  • It is Highly durable
  • Product type:ELECTROMECHANICAL...
  • Package Weight: 4.65 lbs

If you are looking for the best digital compression tester, then Mityvac MV5532 Kit might be your best option. This is an expensive tool but of high-quality and comes in full kit and many other useful accessories.

Apart from compression testing tools capability, you can also use this tool for recording optimum cinder compression and is suitable for all gasoline engines. It is made from heavy-duty materials, making it long-lasting.

It has a standard gauge that is digital featuring a digital screen that will give you an excellent compression reading, which you can diagnose efficiently and correctly. Every time you power on the tool, it shows zero itself. Mityvac MV5532 Kit features many adapters that will help you handle various tasks.

Furthermore, if you have experience using the tool, it can show the right direction at any time. It is the best diesel compression tester and the more luxurious one for premium lovers. What about quality? You cannot undermine this tool for performance; it is more than all average tool kit.

Unfortunately, Mityvac MV5532 Kit is not much suitable for 2-stroke engines, but you can apply calibration, and will work for you better. Give it a try.



  • Pricier compression tester in the market

Buy on Amazon

10. PMD Products Cylinder Compression Tester

PMD Products Compression Gauge Test
  • 10-1/2" Long Reach Hoses : M10 x...
  • 3" Gauge has dual color scale with...
  • Flexible 10-1/2" long reach hoses...

I don’t think you have enough options without this best engine compression tester tool from the PMD brand. PMD Products Compression Gauge test comes in a sturdy storage case containing all necessary accessories for fixing piston rings and valves issues, and also to inspect carbon accumulation and delay timing.

Each set features a 3-inch and metric and standard scales of 0-2100kPa and 0-300 PSI. The gauge also contains a push-button side-release valve that allows you to test without disconnecting tests. Because of the rubber protector in the indicator, this compression tester will serve you for decades.

It is the cheapest tool in the market but carries features you expect to get from high-quality and pricier compression testers. The kit also comes with multiple adapters suitable for most vehicles, i.e., 10mm, 14mm, and 12mm adapters to handle various tasks. It also features flexible 10-1/2-inch hoses with Schrader-valve inserts to enable you to tackle easy-access parts of the vehicle.

More so, the PMD Products Compression Gauge test has a corrosion-resistant brass coupler. This not only extends the lifespan of the tool but also assures you high performance. It is light, weighing about only 2.98 pounds.


  • Lightweight (2.98 pounds)
  • Long-lasting tool
  • Comes with a sturdy case for storage and carrying
  • Gauge protector


  • Questionable performance

Buy on Amazon

Buying Guide: What to Consider When Select Compression Tester

From the above best compression testers for money, I hope you choose the best tester, but if you have not found your choice, don’t worry because here are factors to consider before buying the tool you wish. It will help you choose the best engine compression tester. It is not easy to make the best decision.

a) Storage case

This is an essential factor that should help determine and buy the best compression tester. A tool with a carrying case is suitable for both indoor and outdoor applications. Therefore, with such tools, you can carry it easily and go anywhere you wish.

Furthermore, the case is useful for the storage of the tool. This will prevent your device from damages. A storage case can also prevent your instrument from getting lost. Therefore, for your tool’s safety, go for a compression tester that comes with a storage bag.

However, most of the tools with storage cases are a bit expensive than those without storage cases. Therefore, choose wisely.

b) Gauge

Is another essential factor to put in mind when buying the best engine compression tester? This is the tool responsible for showing you whether the engine valve of your car compression tester is in good condition or not. Another trick, your diameter gauge should have a digital screen to allow you to take readings easily.

The best and high-quality gauge should adjust itself to zero every time before using it. Without this feature, the quality of yours will be questionable. Thank God all the above compression testers have standard gauges that can register up to 300 PSI.

c) Weight

No one would wish to use a tool that is strenuous. The weight of the device will determine your flexibility when working. Don’t buy a tool that is heavy for you to carry and maneuver around with. Almost all products on our list are lightweight; you will not lack a choice.

Apart from durability, you should go for a cylinder compression pressure that is light for your good. However, some testers come with a storage case but are heavy while other is not.

Now, the best choice depends on you.

d) Warranty

Warranty is another critical factor that I thought you should know. Many brands provide different warrants to cover their products within a certain period.  I can advise you to go for all products with a warranty.

Almost the above tools have a 1-year warranty from the manufacturer; it will save a lot of your money and offer you mental satisfaction. Besides, it would be best to buy a tool that their customer care services are up to date.

e) Durability

We all deserve the best and long-lasting tools to carry out our daily activities. Try to inspect the durability of the compression tester you wish to buy. The best tester should be made from heavy-duty and sturdy materials to extend its lifespan.

The quality of the diameter gauge also matters. Almost all of our products on the list have a strong gauge. Check also the state of the hose; a suitable hose should last for an extended period. Therefore, I recommend you go for heavy-duty compression tools.

Frequently Asked Questions: About Compression Tester

1. What should I do when my engine compression is not standard?

Immediately after checking the status of your engine, whether low or high, you should take steps to fix the problem. A machine with a high compression may cause starting problems and sometimes damage the engine. This applies to low compression engines.

2. What is a compression tester?

It is an essential tool for mechanics responsible for checking the engine’s pressure. Compression is critical in vehicles in both gasoline and diesel engines. What you only need is to insert the tool into the diesel injector hole or a spark plug hole and ready carefully the results.

3. How often can I calibrate my compression tester?

These tools don’t need frequent calibration. However, a good number of electronic engine compression testers may force you to use so.

4. Can I use these tools to carry back pressure tests in the exhaust?

Yes, but you will have to get a better adapter and long hose. However, this task is not easy.


After carrying in-depth research, we all indeed have different choices to make on the best compression testers. This report gives you all information you may need to make the best decision. From the above reviews, you can agree that making the best decision is not easy because they possess similar features.

Therefore, if you are not good at making the best decisions for yourself, I suggest you go with our top pick compression tool. It is the best tool with all the exciting features to handle your task correctly.

However, if you have any questions concerning the best compression tester, please visit our website. Our site provides detailed information that will enable you to understand better in these reviews. Besides, you can get other related services, which will facilitate your understanding.

Resource link:

  1. https://www.carbibles.com/compression-tester/
  2. https://carcaretotal.com/best-compression-tester/
  3. https://zcarguide.com/best-compression-tester-engine/
  4. https://www.garagechief.com/best-compression-tester-kit-reviews/

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