Scania DI12 41 Diesel Engine

The Scania DI12 41 is a high‑performance turbocharged heavy‑duty diesel engine engineered to deliver robust, reliable power for demanding applications in marine propulsion, industrial drives and heavy equipment. With a rated output of 442.5 HP (≈ 330 kW) at 1800 RPM, this 12‑liter inline‑6 engine balances strong torque delivery, durable design, and responsive performance making it an excellent choice for operators who require dependable operation under continuous load.

Built by Scania, a global leader in diesel engine technology the DI12 41 series is part of the company modular engine range known for its advanced combustion system, efficient fuel economy, and low emissions relative to its power class. This engine incorporates a turbocharger and charge‑air cooling (intercooler) to improve air intake and combustion efficiency, resulting in higher power density and reduced specific fuel consumption. Its precision direct‑injection fuel system delivers stable performance across a wide load range while maintaining smooth operation and throttle responsiveness.

The rugged construction includes a heavy‑duty cast‑iron block and reinforced internal components designed to withstand high piston loads and thermal stresses found in continuous operation scenarios. Scania proven engineering and quality manufacturing standards ensure the DI12 41 engine provides extended service intervals, high reliability, and longevity in challenging operational environments.

In marine applications, the Scania DI12 41 drives propulsion systems with excellent torque characteristics at cruising speeds and reliable start‑stop performance. Industrially, it supports heavy machinery, pumps, compressors, and power generation equipment where consistent high‑power output is critical. The engine modular design facilitates easier maintenance, global parts availability, and compatibility with a broad range of transmissions and control systems.

With comprehensive after‑sales support from Scania global service network, the DI12 41 offers operators peace of mind through easy access to spare parts, technical support, and service planning. Whether powering a commercial vessel, industrial plant, or heavy duty equipment, the Scania DI12 41 stands out as a high‑performing, efficient, and robust diesel engine optimized for demanding applications.

Technical Specifications

Engine General Data

• Engine Model: Scania DI12 41

• Type: 4‑stroke, water‑cooled diesel engine

• Cylinders: 6 in‑line

• Aspiration: Turbocharged with charge‑air cooler (intercooler)

• Displacement: 12.01 liters

• Bore × Stroke: 130 mm × 160 mm

• Compression Ratio: ~16 : 1 (varies by specific rating)

• Fuel System: Electronically controlled unit injector (Scania PDE system or XPI in later versions)

• Rated Speed: 1800 RPM

• Rated Power Output: 442.5 HP (≈ 330 kW)

• Rotation: Typically counter‑clockwise (viewed from flywheel)

• Governor: Electronic (Scania ECM controller)

• Emissions: Meets applicable marine/industrial emission standards for its build year

Performance

• Rated Torque: ~1,935 Nm (approximate typical torque for 442.5 HP @ 1800 RPM)

• Torque Curve: Strong low‑ and mid‑range torque for acceleration and load handling

• Power‑to‑Weight: Optimized design for high power without excessive engine mass

Cooling & Lubrication

• Cooling System: Closed‑loop liquid cooling with heat exchanger (marine) or radiator (industrial)

• Charge‑Air Cooling: Aftercooler (air‑to‑air or water‑to‑air depending on installation)

• Lubrication: Full‑flow oil filtration with integrated oil cooler

• Oil Capacity: ~30 - 40 liters (depends on configuration)

Physical Data

• Approx. Dry Weight: ~1,400 -1,600 kg (depends on accessories)

• Dimensions (approx.): ~2,000 mm (L) × 950 mm (W) × 1,300 mm (H) (varies with ancillaries)

Systems & Features

• Electronic Engine Management: Scania ECM with integrated sensors for optimized combustion and diagnostics

• High‑Pressure Fuel Injection: Precision injection for improved efficiency and reduced emissions

• Turbocharger: Waste gated or variable geometry turbo depending on variant

• Serviceability: Modular design for easier maintenance and global parts support

Applications

• Marine Propulsion: Workboats, tugs, fast ferries, patrol vessels

• Industrial Drives: Pumps, compressors, heavy machinery

• Power Generation: Diesel generator sets requiring 300‑450 kW class output

Key Advantages

• Strong Torque Delivery: Excellent load‑handling capability

• Fuel Efficiency: Optimized combustion and turbocharging

• Durable Construction: Heavy‑duty block and internals for long life

• Global Support: Worldwide Scania service and parts network