The German manufacturer says its V12-1900 model is its most powerful high-speed diesel engine. © Riviera

The German manufacturer says the V12-1900 model is its most powerful high-speed diesel engine. © Riviera

MAN Engines has delivered two units of its engine model V12-1900 engine to Riviera as the Australian boatbuilder has chosen to to equip its flagship model Riviera 77 Enclosed Flybridge with two V12-1900.

With nearly 25 metres in length, the Riviera 77 will rely on a total engine power of 2,794 kW (3,800 HP) and will be able to achieve a top speed of 35ks, the boatbuilder claims.

Launched and tested in January, the vessel will head to the Middle East after trials.

“The new owner is very eager about the improved performance of the MAN engines which increases the power by 100 HP each. This means an even better acceleration and higher top speed compared to the original top-of-the-range engine,“ says Doug Nelson, motoryacht division manager of Riviera Australia Pty Ltd.

The MAN V12-1900 provide performance enhancement that increased engine power to 1,397 kW (1,900 HP) at a weight of 2,365 kg (dry). Its displacement of 24.2 litres enables the MAN engine to deliver high performance even in the lower engine speed range.

The unit also has the ability to deliver a constantly high torque in a wide range of engine speeds hence the V12-1900 allows to accelerate smoothly and continuously up until the top engine speed range.

Thanks to the performance enhancement that increased engine power to 1,397 kW (1,900 HP) at a weight of 2,365 kg (dry), the MAN V12-1900 sets standards in its class in terms of power-to-weight ratio. © Riviera

Thanks to the performance enhancement that increased engine power to 1,397 kW (1,900 HP) at a weight of 2,365 kg (dry), the MAN V12-1900 sets standards in its class in terms of power-to-weight ratio. © Riviera

MAN says the maximal torque of 6,220 Nm @ 1,200 to 2,100 rpm provides a sufficient power reserve for quick acceleration and driving pleasure on the 25-metre yacht.

The German engine-maker also notes that the design of the its V12-1900 model allows for further convenience on board.

Measuring 2,139 x 1,153 x 1,265 mm (length x width x height), the twin engine installation on board the Riviera 77 Enclosed Flybridge frees up more space under the deck, an advantage that is above all apparent in the master cabin.

The twelve-cylinder V engine MAN V12-1900 had its first global debut at Cannes Yachting Festival 2015.