Volvo Penta D4-320 – Inboard Diesel Engine 320 HP

Volvo Penta D4-320 320 HP – Maximum Torque 4-Cylinder Diesel

Bridging the gap between 4-cylinder efficiency and 6-cylinder performance, the Volvo Penta D4-320 produces a staggering 320 HP at 3600 RPM. This 3.7-liter engine solves the weight distribution challenges in mid-sized hulls by providing high power density in a compact footprint. For American boaters, the D4-320 offers a high-torque repower option that enables rapid acceleration and high cruising speeds without the bulk of a larger engine block, making it ideal for modern USA-built sportfishers and fast commuters.

Fully compliant with USA EPA Tier 3 standards, the D4-320 utilizes a supercharger for low-end punch and a turbocharger for high-end efficiency, eliminating “turbo lag” for the American operator. The engine is fully integrated with Volvo Penta’s EVC system, providing digital precision and compatibility with joystick docking systems favored in busy USA marinas. Its robust freshwater cooling system is engineered for the high-salinity and high-temperature conditions of the American South, ensuring consistent performance and protection.

Core Technical Specifications

• Maximum Output: 320 HP at 3600 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).
• Fuel System: Common-rail direct injection.
• Electrical: 12V / 115A alternator standard.
• Compliance: EPA Tier 3 and USCG compliant.