Engine Comparisons: VGT450

 

 

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 450. 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 450 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 450 D6 435 QSB 5.9 6CXBM-GT N67 450
Retail Price (Manufacturer’s Suggested Retail Price, online. Prices may vary significantly. Add’l discounts may be avail) € 35,557 € 57,976 € 35,258 € 52,679 € 33,803
BHP 450 435 420 464 450
kW 336 320 313 341 331
RPM 3600 3500 3400 2700 3000
Cyl 8 6 6 6 6
Displacement (l) 6.6 5.5 5.9 7.4 6.7
Bore / Stroke (mm) 103/98 103/110 102/120 106/110 104/132
Maximum Torque Nm 980 1040 1231 1280 1500
Time Between Overhaul (hours) 3000 1000 2000 1000 1500
Time Between Maintenance (hours) 100 50 75 50 100
Dry Weight 510 699 658 856 650
Fuel Cons at Top Speed g/kWh 220 208 218 227 215.5
Power / Weight kW/kg 0.66 0.46 0.48 0.40 0.51
Euros per kW € 105.82 € 181.18 € 112.65 € 154.48 € 102.12
Overhaul Cost (60% of New) € 21,334.20 € 34,785.60 € 21,154.80 € 31,607.40 € 20,281.80
Cost at 10,000 hours (Purchase, Overhauls, and Maintenance) € 106,673 € 405,836 € 141,035 € 368,757 € 169,017
Fuel Cost at 10,000 hours, Fuel EUR 0.80 / Litre (Calculated at 420 hp) € 657,943 € 615,441 € 649,848 € 670,190 € 634,895
Total Cost of Ownership 10,000 hours € 763,943 € 1,021,277 € 790,882 € 1,038,947 € 803,912

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

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

MarineDiesel VGT 450: 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 435: 1,456 X 753 X 897

Cummins QSB 5.9: 1,255 X 836 X 858

Yanmar 6CXBM-GT: 1,390 X 901 X 989

FPT N67 450: 1,063 X 843 X 766

 

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 VGT450:

VGT450 curves 100714

Volvo Penta D6 435:

d6 pwr torque

Cummins QSB 5.9 420:

cummins qsb 420 curve

Yanmar 6CXBM-GT Curves:

yanmar 6cxbm curve

FPT N67 450 Curves:

FPT N67 450 curve