D8-450

This in-line six-cylinder, four-stroke, direct-injected, turbocharged diesel engine with an aftercooler represents a robust power solution for marine applications. Featuring a displacement of 7.7 liters and a compression ratio of 16.5:1, the Volvo Penta D8-450 engine is designed to comply with IMO NOx and US EPA Tier 3 emission standards. The engine's crankshaft power output ranges from 331 kW (450 hp) at 2700 RPM for the D8-450 variant, up to 405 kW (550 hp) at 2900 RPM for the D8-550 version. Each cylinder features a four-valve-per-cylinder layout with overhead camshafts and cross-flow inlet and exhaust ducts, ensuring efficient combustion and performance. The engine is available with either a seawater-cooled heat exchanger or a keel cooling system, providing flexibility in cooling solutions. Additionally, the D8-450 is equipped with a common rail fuel injection system and an Engine Management System (EMS) for precise control and optimized performance.