Skip to main content




Tuesday, June 11, 2019 

Volvo Penta has updated its established D4 and D6 range of prime movers to deliver its most technically advanced marine engines to-date.

Both engines have been reengineered for increased power and greater reliability. Available from 150-480 hp, the new 3.7litre D4 and larger 5.5litre D6 engines are part of fully integrated propulsion package that can include the company’s Aquamatic sterndrive, shaft and water-jet installations

Commenting on the update engines during their unveiling at last week’s Nor-Shipping event, Petter Andolf, Chief Project Manager for the D4/D6, said: “The list of performance upgrades are lengthy and includes a new engine management system, new fuel injection system, new turbocharger and a new supercharger. The cylinder head, pistons, and valves are reengineered to withstand higher torque as well as meeting higher reliability and durability requirements.”

According to Andolf, the changes are “more than a facelift”, with the majority of components having been reengineered. The D4 and D6 deliver performance outputs of between 150 to 480 hp. In top specification the D4 now has a maximum output of 320 hp, while the D6 in top spec boasts 480 hp. Offering up to10% more power across the range, these engines are also more fuel efficient – between 1% to 7%.

Ingela Nordström, Product Manager for the D4/D6 engines, furthered: “The majority of the components are reengineered to manage the increased power as well as reaching the extended reliability targets. For instance, the cylinder head, piston and crankshaft are all stronger by design and new materials has been introduced such as a Diamond Like Carbon (DLC) coating on the piston pin to reduce friction and increase durability. The common rail fuel injection system now features higher pressure – 2,000 bar. Controlled by a new Engine Management System, this enables more precise calibration of parameters controlling the injection, so the engines run even smoother and are more fuel efficient.”

Volvo Penta is marketing the new generation engines to those operators looking to reduce maintenance costs. Due to their extended service intervals, the engines require fewer service items, and are less complex to maintain. An upgraded Electronic Vessel Control (EVC) system also delivers improved service capabilities through an onboard service assistant that provides information about time left to next service.

Each propulsion system comes as one complete package. The installation dimensions are largely the same as the previous generation of D4 and D6 engines.

Reader Comments (0)

There are currently no comments on this article. Why not be the first and leave your thoughts below.

Leave Your Comment

Please keep your comment on topic, any inappropriate comments may be removed.

Return to index

Web Analytics