Best of 2014 – VGT Series vs Cummins QSB 5.9 – How do we Compare?



We wish all MarineDiesel customers a happy holiday season. Our factory will close from December 22 through January 5. For the balance of the year, we will be re-running our most popular articles from 2014, based on the number of visitors. We will start new daily articles in the New Year. We hope that you continue to find them interesting.

The VGT Series of marine engines is MarineDiesel’s flagship product. We originally aimed to make the lightest, most powerful, most reliable engine available in the market, and we succeeded where others have not.

So, how does the VGT Series compare to others?


MarineDiesel VGT: Mid-range

Cummins QSB 5.9: Low

*Price will vary greatly based on many factors, including import duties and dealer markups, but in general


Cost of Spares:

MarineDiesel VGT: Mid-range

Cummins QSB 5.9: Mid-range

*Note: The Cummins engines are sold and serviced through the CMD network, which is largely focused on the recreational market



MarineDiesel VGT: Commercial / Military Medium to Heavy use

Cummins QSB 5.9: Recreational


Engine Block:

MarineDiesel VGT: V-8

Cummins QSB 5.9: Inline 6

*Inline cylinder arrangements tend to produce higher levels of vibration



MarineDiesel VGT: 500 kg

Cummins QSB 5.9: 658 kg


Fuel Consumption:

MarineDiesel VGT: Max 220 g / kWh

Cummins QSB 5.9: Max 235 g/kWh



vgt400 fuel


vgt400 curves

Cummins QSB 5.9 Power Curve

Cummins QSB 5.9 Power Curve