Diesel engines are capable of producing a lot more torque than gasoline engines. These are the heavy-duty truck engines and how they stack up. But the engine has been essentially unchanged since when new injectors and a turbocharger were added. It's also equipped with an Allison automatic transmission, which is another renowned brand among trucks and another draw to the engine.
The Ram Heavy Duty's Cummins diesel engine is unusual: it only has six cylinders and is in an inline configuration versus rivals' V8. But that's the way it's always been for the Cummins engine in these pickups, and, at 6. The engine produces horsepower and lb-ft of torque in the Ram , or horsepower and 1, lb-ft of torque in the Ram All of the domestic brands are relatively close in terms of torque. Other factors, including how much they weigh and how much optional equipment they have to carry all of the time, affect performance to some degree.
Torque and horsepower are significant factors in how much a truck can tow. But two other factors play a part. The first is the structural design of the truck itself, and the other is the engine's strength.
However, towing over 26, pounds requires a commercial driver's license in all US states. Both the Ram's Cummins seen above and Ford's Power Stroke can pull over that amount, but the Duramax lags with a total towing capacity of 23, The Power Stroke wins here again with a total towing amount of 34, pounds versus Ram's 31, pounds.
However, if you're looking at these numbers and do not hold a commercial license, any of these trucks will likely fit the average truck owner's requirements. Ultimately, heavy-duty diesel trucks are meant to do work, not garner excellent fuel economy. As a result, the Environmental Protection Agency EPA is not required to test these vehicles because they exceed the weight maximum to be considered against automakers' fuel economy averages.
But given that diesels are generally more efficient than gasoline engines, these engines should allow a greater driving range. Don't consider emissions to be good, however, but since the EPA doesn't rate this, it's uncertainty. And also consider that newer trucks aren't straightforward conversions for biodiesel. More modern high-pressure common-rail diesels are more complex than previous engines and contaminants can build up in the fuel system.
It can also affect the cylinder heads. All of this can lead to big bills, so consult a mechanic and the warranty first. Probably even more important than engine specs is a guarantee of reliability. Long warranties don't necessarily mean that the engine is guaranteed to work that long, but rather that any issues will be addressed if they happen during that period.
Not only that, but the manufacturer likely has a reasonable assumption that the engine will last that long. If they didn't, they wouldn't make a warranty where they'd lose money as issues continued to crop up.
Still, all three engines are covered under typical automaker powertrain warranties, so there's little to differentiate among the models. Cummins has enjoyed superior popularity for a long time, but the increasingly better design on the Power Stroke has pushed it well into the running in terms of performance.
The main reason is that the two main specs of torque and horsepower are very close. The Power Stroke has more horsepower but slightly less torque, while the Cummins has the opposite. When it comes to diesel truck engines, there are two names that lead the pack: Duramax and Cummins.
It can be a struggle to decide which engine to choose. Fortunately, there is no wrong answer. Neither engine is better than the other, but they do have distinct similarities and differences. Duramax began with a partnership between companies General Motors and Isuzu. The first generation of Duramax engines launched in At the time, Duramax engines offered pounds-feet of torque. Since its initial release, there have been many different updated models for the Duramax engine.
Duramax quickly got another update when the Duramax LMM came out in the middle of After that, the LML arrived in The Cummins brand is much older than Duramax. The Chrysler Corporation has been using Cummins engines in their Rams since Meanwhile, GM has only been using the Duramax engine since , a little more than 20 years ago.
If you think a long-established brand is important, then the history behind Cummins will appeal to you. The first Cummins diesel engine used in a Ram truck was the 5. The 6. This new engine offered more torque — pound-feet of it— while running half as loud.
Diesel trucks are renowned for their towing abilities. Many people buy diesel trucks to help them carry heavy equipment, such as trailers, campers, and boats. How much torque a Duramax engine or a Cummins engine provides varies from truck to truck. However, the 6. From to , the Duramax 6.
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