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Volvo Penta D4-300 – Marine Diesel Engine 300 HP
Volvo Penta D4-300 – 300 HP is a flagship 4-cylinder 4-stroke propulsion unit that employs a mechanical supercharger for massive low-end torque and a turbocharger for top-end speed. This dual-induction system ensures immediate hole-shot performance, effectively eliminating turbo lag and allowing heavy offshore hulls to achieve plane quickly while maintaining the compact footprint of a four-cylinder block.
- Precision Operational Data: Rated at 300 HP (221 kW) at 3500 RPM.
- Internal Engine Configuration Type: Inline 4-Cylinder 3.7L Supercharged/Turbocharged.
- Advanced Fuel Delivery System: Electronic Common Rail with Multi-Injection.
- Recommended Vessel Application Use: Engineered for performance sportboats and fast coastal cruisers.
- Factory Protection Service Plan: Volvo Penta 2+3 year limited warranty coverage.
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Description
Volvo Penta D4-300 300 HP – High-Performance 4-Cylinder Diesel
Eliminating the weight penalty of larger 6-cylinder engines while maintaining high horsepower is the core engineering achievement of the Volvo Penta D4-300. Delivering 300 HP at 3500 RPM, this 3.7-liter powerhouse utilizes a sophisticated common-rail fuel system and dual-charging (supercharger and turbocharger) to provide instantaneous throttle response for American express cruisers. For the USA boater, this translates to faster planing times and superior fuel efficiency during high-speed transits across coastal sounds and bays.
Adhering to strict EPA Tier 3 emission standards, the D4-300 features Volvo Penta’s EVC (Electronic Vessel Control) for ultra-smooth shifting and precise digital management. Engineered for the USA maritime market, this engine package supports seamless NMEA 2000 integration, allowing for real-time data sharing with modern helm electronics. The fresh-water cooling system is designed to withstand high-salinity conditions from the Florida Keys to the Pacific Northwest, ensuring long-term internal component protection against corrosion.
Core Technical Specifications
- Maximum Output: 300 HP at 3500 RPM.
- Displacement: 224 cubic inches (3.67 Liters).
- Configuration: 4-cylinder in-line, 4-stroke diesel.
- Aspiration: Supercharged and Turbocharged with intercooler.
- Dry Weight: Approximately 1060 lbs (engine only).
- Alternator: 115A high-output marine alternator.
- Compliance: Fully certified EPA Tier 3 standards.
- Bore and Stroke: 4.06 x 4.33 inches.
Volvo Penta D4-300 Full Specs
| Engine type | In-line 4, 4-stroke Diesel |
| Displacement | 3.7L (224 cid) |
| Bore x stroke | 103 x 110 mm |
| Horsepower | 300 hp (221 kW) |
| Rated rpm | 3500 rpm |
| Aspiration | Turbo, Supercharger, Aftercooler |
| Compression ratio | 17.5:1 |
| Fuel system | Common Rail Fuel Injection |
| Recommended fuel | Diesel (EN 590 / ASTM D975) |
| Ignition/Firing Order | Compression / 1-3-4-2 |
| Alternator | 12V/150A or 24V/80A |
| Gear ratio/Drive | HS68A / HS85A / DPH Drive |
| Transmission | Hydraulic Marine Gear |
| Dry weight | 580 kg (1279 lbs) |
| Flywheel housing | SAE 4 |
| Steering | Electronic Vessel Control (EVC) |
| Coolant capacity | 13L |
| Exhaust system | Water cooled manifold |
| Cooling system | Heat Exchanger Cooling |
| Lubrication | Pressure feed (Wet Sump) |
| Oil capacity | 9L |
| Emissions rating | EPA Tier 3, IMO II, RCD II |
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