Quote:
Originally Posted by tmclaren
I am finding some Ram 2500 with the 5.7 engine. I know there is a difference between the 6.4, but how much of a difference? Of course we can get a better deal on the 5.7.
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One of the differences is the lack of MDS on the 5.7 (unless something's changed). The MDS helps with fuel economy on the 6.4 by allowing variable displacement (cutting out half the motor while under no or light load). Other than that, there is some difference in HP and Torque, but really less than you would think. For the 6.4 (in my understanding) the torque curve is shallower in the RPM band, and that's good for towing. There are some other differences too I think, but those were the ones that got my attention when I was shopping.
I looked at the 5.7, but the increase in price (around $1600 on a new truck? IIRC?) was worth it to me to get the 6.4.
All that being said, people have been towing with the 5.7L equipped HD Ram trucks for A LONG time. If I were going with a 5.7, I would most certainly get the highest gear ratio number I could find. It would get crappy gas mileage empty, but it would help with towing.
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-2018 Greyhawk 29MV
-2020 Jeep Wrangler Unlimited (JLU) (Primary Toad)
-1994 Jeep Wrangler YJ (Secondary Toad)
-2014 Jay Flight 28BHBE & Ram 2500 6.4L CC 4x4 (sold)