PORSCHE M44-40 Engine Longblock Compression M44/40 2.5 171K

( Manufacturer Part Number: M44/40 ), ( Part Type: Engine Compression ), ( Engine Size: 2.5 L ), ( Fuel Type: Gasoline ), ( Block Type: Straight )

Review PORSCHE M44/40 2.5 Engine Longblock 171k Compression Tested fits M44 944 1985–1987

Introducing the Porsche M44/40 85-87 944 2.5 engine longblock, a premium replacement powertrain engineered for optimal performance and reliability. This engine longblock, specifically designed for Porsche 944 models from 1985 to 1987, boasts a 2.5-liter capacity and a compression ratio of 171,000 psi (11.3:1).

The M44/40 engine is renowned for its potent and agile power delivery, making it an excellent choice for those seeking a high-performance upgrade or a reliable replacement for their aging 944 engine. Each component of this longblock is meticulously crafted, ensuring a seamless fit and flawless operation within your vehicle.

The cylinder block serves as the foundation of the engine, machined to exacting standards to accommodate the precision-engineered pistons, rings, and crankshaft. The engine's cylinders are bored to accommodate oversized pistons, enabling increased displacement and power output.

The crankshaft, forged from high-strength steel, rotates smoothly and efficiently to transfer power from the combustion process to the transmission. The long-lasting and durable connecting rods securely fasten the pistons to the crankshaft, ensuring optimal power transfer and minimal vibration.

Atop the crankshaft sits the cylinder head, home to the intake and exhaust valves, as well as the combustion chamber. Each valve is meticulously adjusted for optimal sealing and flow, while the combustion chamber is designed to accommodate the engine's high-compression design.

The intake system features a high-flow airbox and intake manifold, ensuring an ample supply of fresh air to the engine for optimal combustion. The exhaust system is equally well-designed, with a flow-optimized exhaust manifold and catalytic converter, ensuring efficient exhaust gas flow and minimal emissions.

The engine longblock is also equipped with a high-performance timing system, including a camshaft and crankshaft position sensor, ensuring precise engine timing and optimal power delivery.

Furthermore, the engine longblock is fitted with a high-performance oiling system, ensuring that all components are adequately lubricated for optimal performance and longevity. This includes a high-capacity oil pump, a high-performance oil cooler, and a high-quality oil filter.

Finally, the engine longblock is equipped with a high-performance cooling system, including a large-capacity radiator, a cooling fan, and a high-quality coolant pump, ensuring that the engine remains cool and efficient even under the most demanding driving conditions.

In summary, the Porsche M44/40 85-87 944 2.5 engine longblock is a top-tier replacement powertrain engineered for optimal performance and reliability. With its high-compression design, precision-engineered components, and advanced cooling and lubrication systems, this longblock is the ideal choice for those seeking to upgrade or replace the engine in their Porsche 944.

Buying a Porsche M44/40 85-87 944 2.5 engine longblock with 171k compression and applicable to the 1986 and 1987 models can be an intriguing prospect for Porsche enthusiasts looking for a project or a replacement engine. Let's weigh the potential pros and cons of making such a purchase.

1. Affordability: Compared to purchasing a complete car or a new engine from a dealership, buying a used longblock engine can be a more budget-friendly option.

2. Availability: These engines are relatively common and are widely available in the used market, making it easier to find a good one with a reasonable price.

3. Potential Performance Upgrades: With a longblock engine, you have the freedom to upgrade various components, such as camshafts, intake system, and exhaust system, to potentially enhance the performance of your Porsche 944.

1. Unknown Condition: Since you're purchasing a used engine, you may not know its exact condition and history, which could lead to potential issues down the line.

2. Installation Costs: Installing a longblock engine on your own can be a complex and time-consuming process, requiring specialized tools and knowledge. You may need to factor in the cost of labor if you choose to have a professional install the engine.

3. Compatibility: Ensure that the engine longblock you're considering is compatible with your specific Porsche 944 model and any modifications you may have made to the car.

Considering the pros and cons, buying a Porsche M44/40 85-87 944 2.5 engine longblock with 171k compression can be a worthwhile investment, as long as you're aware of the potential risks and are willing to put in the effort to ensure the engine's compatibility, installation, and potential upgrades.

If you decide to pursue this option, make sure to research the specific engine longblock you're considering and its seller thoroughly. Inspect the engine for any signs of damage or wear, and ask for any available documentation, such as service records or receipts for previous repairs. Additionally, consider seeking advice from fellow Porsche enthusiasts or a knowledgeable mechanic before making the purchase.

Details:

Engine has undergone a FULL Compression test displaying healthy equal numbers of 140 150psi Within spec maximum 2-bar difference standard on all 4 cylinders Compression results engine run video below. BEFORE INSTALLING ANY USED ENGINES - The following preventative maintenance is strongly recommended to prolong the life of your engine and protect its warranty. Fill up with new oil and replace filter All of our engines are fully drained. Items are guaranteed to fit the above stated donor vehicle exact make model produced years.

Replace valve cover gaskets. Replace timing belt If its not chain driven. AC Compressor. Replace thermostat Water pump.

Engine has been fully driven and compression tested Compression result below - Ran smooth well with no issues. Minor scratches and usage wear as expected on a used item - PLEASE REFER TO PHOTOS.: Genuine OEM Porsche Part. Please refer to the check list below and perform mentioned maintenance prior installing and/or starting engine Replace all oil seals.

Documented Mileage: 171,179Miles/ 275,487 Kilometers Documented, Actual Miles/Kilometers. Genuine OEM 85.5-87 Porsche 944 Base M44/40 2.5 NA Engine Longblock assembly removed from a 86 5spd Manual C0195. Oil has been fully drained - NO metal shavings or odd particles detected. OEM Porsche Item: Factory product - NOT AFTERMARKET.

Recycle Save Fast Shipping 85-87 Porsche 944 2.5 NA Engine Longblock M44/40 171KCOMPRESSION TESTED 86 87. Compression Test Results. Replace spark plugs. Condition: In good USED condition with minor usage wear.

part #: m4440 prices

• $359.99-$3499.99

specifications grokengines:

• for models: M44, 944
• for makes: Porsche
• for years: 1985-1987
• mpn: M44/40
• part type: Engine Compression
• engine size: 2.5 L
• fuel type: Gasoline
• block type: Straight

seller grokengines:

• rating: 100.0%
• # reviews: 2164
• city: Blaine, Washington

payments grokengines:

• wallet: Apple-pay
• other
• credit card: Mastercard

offer grokengines:

• options: Ship-to-home
• availability: In Stock
• started: December 7, 2025
• quantity: 1
• sold: 0

general grokengines:

• Car Truck Parts Accessories > Engines Engine Parts > Engines
• condition: Used

returns grokengines:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days

shipping grokengines:

• service: Flat Rate Freight
• cost: $590.00
• class: Freight
• type: Fixed

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