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Volvo Penta D8-550 – Inboard Diesel Engine 550 HP
Volvo Penta D8-550 – 550 HP utilizes a heavy-duty 7.7L inline-six marine diesel architecture featuring a twin-entry turbocharger and a high-output alternator for large offshore vessels. This unit provides massive low-end torque and is engineered for high-load durability, making it the premier choice for large flybridge cruisers and commercial fishing vessels requiring reliable, continuous-duty power.
- External Engine Dimensions: Inline 6-Cylinder 7.7L Displacement.
- Standard Engine Block Architecture: Cast Iron Block and Head with EVC integration.
- Intelligent Fuel Management System: Electronic High-Pressure Common Rail.
- Vessel Hull Integration Guide: Recommended for large offshore yachts and commercial hulls.
- Reliability And Service Plan: Volvo Penta global dealer support network.
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Description
Volvo Penta D8-550 550 HP – Reliable Mid-Range Yacht Power
Balancing high-torque density with smooth, linear power delivery, the Volvo Penta D8-550 produces 550 HP at 2900 RPM. This engine is specifically engineered for mid-sized American motor yachts and sportfishing vessels that require consistent thrust in heavy seas. The 7.7-liter block utilizes advanced thermal management and electronic fuel mapping to minimize noise and vibration, providing a refined environment on deck for USA cruising families. Its compact dimensions for its displacement allow for versatile installation in twin-engine configurations common in American-built hulls.
Fully compliant with USA EPA Tier 3 standards, the D8-550 emphasizes operational clean-burning efficiency and reduced environmental footprint. The engine is NMEA 2000 compatible, allowing American owners to monitor real-time performance data on modern glass bridge systems. Its heavy-duty cooling system and integrated oil cooler are built to withstand the rigorous demands of seasonal use in the Pacific Northwest or year-round operation in the Gulf of Mexico, providing a dependable partner for long-distance American maritime adventures.
Core Technical Specifications
- Maximum Output: 550 HP at 2900 RPM.
- Displacement: 470 cubic inches (7.7 Liters).
- Configuration: 6-cylinder in-line, water-cooled diesel.
- Aspiration: Turbocharged and intercooled.
- Dry Weight: Approximately 1863 lbs (excluding gear).
- Fuel Injection: Electronic common-rail system.
- Electrical: High-capacity charging system standard.
- Compliance: EPA Tier 3 and RCD2 certified.
Volvo Penta D8-550 Full Specs
| Engine type | In-line 6, 4-stroke Diesel |
| Displacement | 7.7L (470 cid) |
| Bore x stroke | 110 x 135 mm |
| Horsepower | 550 hp (405 kW) |
| Rated rpm | 2900 rpm |
| Aspiration | Twin Turbo, Supercharger, Aftercooler |
| Compression ratio | 16.5:1 |
| Fuel system | Common Rail Injection |
| Recommended fuel | Diesel (EN 590) |
| Ignition/Firing Order | Compression / 1-5-3-6-2-4 |
| Alternator | 24V/110A |
| Gear ratio/Drive | ZF 286A / Shaft |
| Transmission | Hydraulic |
| Dry weight | 840 kg |
| Flywheel housing | SAE 2 |
| Steering | EVC Electronic |
| Coolant capacity | 35L |
| Exhaust system | Water cooled |
| Cooling system | Heat Exchanger |
| Lubrication | Wet Sump |
| Oil capacity | 27L |
| Emissions rating | EPA Tier 3, IMO II |
Volvo Penta D8-550 Service & Performance Guide
What is the fuel consumption of the Volvo Penta D8-550?
The D8-550 consumes roughly 27.5 gallons per hour at its full 2,900 RPM rating. The 7.7-liter block is tuned for heavy-duty recreational use, providing massive low-end torque for quick planing. Cruising at 2,100 RPM offers an excellent efficiency window for mid-sized sport-fishing boats and cruisers.
What oil grade is required for the Volvo Penta D8-550?
This engine requires 28.5 quarts of VDS-4.5 grade SAE 15W-40 oil. High-pressure common-rail systems require oil with superior soot-handling capabilities to prevent injector wear. Change the oil and the primary and bypass filters every 200 hours to ensure the engine meets its designed service life of thousands of hours.
How does the Volvo Penta D8-550 cooling system operate?
The engine uses a freshwater cooling loop with a seawater-cooled heat exchanger, intercooler, and oil cooler. The system is thermostatically controlled to maintain a precise operating temperature for optimal fuel atomization. Always check the sacrificial zinc anodes in the seawater circuit monthly to prevent galvanic corrosion of the exchangers.
What are the electrical system specifications for this engine?
The D8-550 comes equipped with a 24V-110A alternator, integrated with Volvo Penta's EVC platform for digital throttle and gear control. This allows for advanced features like Joystick Docking and Dynamic Positioning. Ensure the battery bank is sized appropriately to handle the electronic engine management's constant power draw.
What are the physical dimensions and weight of the D8-550?
The dry weight is 1,852 lbs, with a total length of 53.3 inches and width of 36.3 inches. Its robust construction is built for long-term durability in high-demand marine environments. Allow for 8 inches of overhead clearance to facilitate easy access to the top-mounted fuel and oil filters during service.
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