Engine Comparisons: VGT350

 

 

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.)

Some specifications:

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
BHP 350 370 350 370 370
kW 261 272 261 272 272
RPM 3600 3500 2800 3300 3000
Cyl 8 6 6 6 6
Displacement (l) 6.6 5.5 5.9 5.1 5.9
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
Dry Weight 500 677 612 530 595
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

 

Curves:

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.

MarineDiesel VGT350:

vgt350 curves 1014

Volvo Penta D6 370:

d6 370 curves

Cummins QSB 5.9 355:

cummins qsb 355

Yanmar 6LYA-STP:

yanmar 6lya curves

FTP N60 370 (A2):

FTP N60 curves