Volvo Penta D6-400 DPI Diesel Aquamatic

The Volvo Penta D6-400 DPI Diesel Aquamatic is a high-performance marine propulsion system engineered as a complete, fully integrated package combining a powerful diesel engine with the advanced DPI (Duoprop Inboard Performance) sterndrive. Designed for premium leisure boats and professional marine applications, this propulsion solution delivers strong acceleration, smooth operation, precise maneuverability, and excellent fuel efficiency while maintaining durability and low emissions.

At the heart of the system is a robust 5.5-liter inline six-cylinder diesel engine featuring double overhead camshafts, four valves per cylinder, and a high-pressure electronically controlled common-rail fuel injection system. The engine incorporates both turbocharging and supercharging with an efficient charge-air cooler to optimize airflow and combustion across the full RPM range. Volvo Penta D6-400 configuration produces strong low-end torque for rapid planing and responsive throttle performance, ensuring consistent power delivery even under heavy loads or challenging sea conditions. The engine generates approximately 400 horsepower (294 kW) at up to 3,500 RPM, providing an excellent balance of performance and fuel economy.

The Volvo Penta D6-400 DPI is developed as a seamless propulsion platform from helm to propeller, ensuring precise interaction between engine, control systems, and drive unit. Integration with Electronic Vessel Control (EVC) enables smooth electronic throttle and shift operation, advanced diagnostics, and compatibility with modern helm displays. Optional features such as joystick docking and cruise control enhance handling precision and simplify boat operation in tight maneuvering situations, improving both safety and operator confidence.

A defining feature of the system is the DPI Aquamatic sterndrive equipped with counter-rotating DuoProp propellers. This dual-propeller configuration provides superior water grip, improved directional stability, reduced cavitation, and increased propulsion efficiency across a wide speed range. The hydrodynamically optimized sterndrive contributes to reduced vibration levels, improved onboard comfort, and enhanced fuel economy during cruising.

Durability and long service life are central to the D6 platform design. The engine block and cylinder head are constructed from high-strength cast iron with an integrated ladder frame for structural rigidity and resistance to marine operating stresses. Oil-cooled pistons, advanced lubrication systems, replaceable full-flow and bypass oil filters, and integrated monitoring sensors help maintain optimal engine performance while extending maintenance intervals. Freshwater cooling with a heat exchanger protects internal components from corrosion and ensures consistent operating temperatures.

Maintenance and serviceability are simplified through built-in monitoring systems, including oil level and temperature sensors, crankcase ventilation management, and electronic service reminders accessible through the vessel display interface. These features help minimize downtime, improve reliability, and reduce overall operating costs for both recreational owners and commercial operators.

With compliance to major international marine emission standards, compact installation dimensions, and a high power-to-weight ratio, the volvo d6 400 Diesel Aquamatic represents a modern propulsion solution that combines power, intelligent control, efficiency, and reliability in a sophisticated integrated package designed to deliver confident performance across a wide range of boating environments.