Engine Comparisons: VGT400

 

 

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 400. 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 4oo 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 400 D6 400 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) € 34,857 € 34,520 € 35,258 € 33,407 € 29,957
BHP 400 400 420 370 400
kW 299 299 313 272 294
RPM 3600 3500 3400 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 500 699 658 530 595
Fuel Cons at Top Speed g/kWh 215 214 218 215 215
Power / Weight kW/kg 0.60 0.43 0.48 0.51 0.49
Euros per kW € 116.58 € 115.45 € 112.65 € 122.82 € 101.89
Overhaul Cost (60% of New) € 20,914.20 € 20,712.00 € 21,154.80 € 20,044.20 € 17,974.20
Cost at 10,000 hours (Purchase, Overhauls, and Maintenance) € 104,573 € 241,644 € 141,035 € 233,853 € 149,787
Fuel Cost at 10,000 hours, Fuel EUR 0.80 / Litre (Calculated at 370 hp) €566,887 € 564,250 € 575,086 € 556,952 € 557,407
Total Cost of Ownership 10,000 hours € 671,460 €805,894 € 716,121 € 790,805 € 707,194

So, engine weights are listed in the table above. What about engine size?

(L) X (W) X (H), in mm

MarineDiesel VGT 400: 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 400: 1,357 X 786 X 920

Cummins QSB 5.9: 1,255 X 836 X 858

Yanmar 6LYA – STP: 1,274 X 819 X 843

FPT N60 400: 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 VGT400:

VGT400 torque

VGT400 torque

Volvo Penta D6 400:

vp d6 400 curves

Cummins QSB 5.9 Curves:

cummins qsb 420 curve

Yanmar 6LYA-STP Curves:

yanmar 6lya curves

FTP N60 400 Curves:

FTP N60 curves