This week, we will be highlighting several of our engine models and be comparing them with others that are in the market. Our engines stand on their own merits. All data on other engines is available online. Comparisons are based on closest models / ratings for each manufacturer.
This article is related to the MarineDiesel VGT 350. Using the Duramax 6.6L as a base, we have created the lightest, smallest, and most powerful marine engine in the market today. Ideally suited for small, very fast craft, the VGT 350 delivers the high performance standards that simply leave other engines lacking.
Figures are based on commercial rating, when possible (Some manufacturers only have one rating, others have multiple ratings.)
|Engine Comparison||MarineDiesel||Volvo||Cummins||Yanmar||Iveco / FPT|
|Engine Model||350||D6 370||QSB 5.9||6LYA-STP||N60-400|
|Retail Price (Manufacturer’s Suggested Retail Price, online. Prices may vary significantly. Add’l discounts may be avail)||€ 30,450||€ 29,985||€ 31,694||€ 31,361||€ 28,964|
|Bore / Stroke (mm)||103/98||103/110||102/120||106/110||104/132|
|Maximum Torque Nm||820||980||1231||1010||1060|
|Time Between Overhaul (hours)||3000||1000||2000||1000||1500|
|Time Between Maintenance (hours)||100||50||75||50||100|
|Fuel Cons at Top Speed g/kWh||215||216||219||215||225|
|Power / Weight kW/kg||0.52||0.40||0.43||0.51||0.46|
|Euros per kW||€ 116.67||€ 110.24||€ 121.43||€ 115.30||€ 106.49|
|Overhaul Cost (60% of New)||€ 18,270.00||€ 17,991.00||€ 19,016.40||€ 18,816.60||€ 17,378.40|
|Cost at 10,000 hours (Purchase, Overhauls, and Maintenance)||€ 91,352||€ 209,899||€ 126,779||€ 219,531||€ 144,822|
|Fuel Cost at 10,000 hours, Fuel EUR 0.80 / Litre (Calculated at 350 hp)||€ 534,429||€ 532,898||€ 544,371||€530,430||€ 555,101|
|Total Cost of Ownership 10,000 hours||€ 625,781||€ 747,797||€ 671,150||€ 749,961||€ 699,923|
So, engine weights are listed in the table above. What about engine size?
(L) X (W) X (H), in mm
MarineDiesel VGT 350: 779 X 825 X 973 (Note: MarineDiesel engines always allow for remote location of some components, such as the grid cooler, filters, or starter motor. Dimensions, particularly height, can often be reduced considerably or shifted around to a great extent.)
Volvo Penta D6 370: 1,439 X 754 X 885
Cummins QSB 5.9: 1,255 X 836 X 858
Yanmar 6LYA – STP: 1,274 X 819 X 843
FPT N60 370: 1,349 X 843 X 788
When comparing power, and especially torque, curves, you need to keep in mind how the vessel will be used. All engine manufacturers rate their engines differently, many times with several different ratings under a single model. Others, like MarineDiesel, can change the ECU and engine programming to suit a vessel’s mission. The curves below are the most common ratings, but when reviewing, attention must be given that these curves can be different or altered due to rating.
Volvo Penta D6 370:
Cummins QSB 5.9 355:
FTP N60 370 (A2):