2014 Jeep Wrangler (20 mpg hwy) vs 2015 Ram 1500 (25 mpg) differences?

[redpoint5]

Originally Posted by Xist

I am seeing 4,277 pounds for the Jeep and 5,441 for the Dodge--the truck is 27% heavier!

It just goes to show that weight doesn't much affect fuel economy.

Surprisingly, the EPA rates the truck at 1 MPG better than Jeep in city driving. Aero and weight can't explain the advantage the truck has, so I'm guessing it's the transmission.

[oldtamiyaphile]

Originally Posted by redpoint5

Surprisingly, the EPA rates the truck at 1 MPG better than Jeep in city driving. Aero and weight can't explain the advantage the truck has, so I'm guessing it's the transmission.

CRR is a big factor on the city cycle and light truck tyres can be considered LRR's compared to any of the off road-ish treads.

[adam728]

Here's a good link.
http://www.rambodybuilder.com/2014/d...ammlup1500.pdf
On the low end you have a 2wd, regular cab, short bed Tradesman at 4,512 lbs.
On the high end you have a crew cab 4x4 with the diesel at 6,147 lbs.

On Ram's site they list the lightest as a 2wd, regular cab, short bed Sport, 4,525 lbs.

According to Jeep's webpage a 4 door Rubicon is 4,340 lbs.

[Xist]

Originally Posted by adam728

On the high end you have a crew cab 4x4 with the diesel at 6,147 lbs.

That high-end 6,147-pound diesel is rated 19/27.

[Hersbird]

Its the 8 speed. A Jeep grand Cherokee which gets the 8 speed beats the Ram in fuel economy comparing 4x4 to 4x4.

[Fat Charlie]

It shows that how you use the power is what has the most effect. Taller gearing helps a lot, and in the EPA test where driving style is consistent, cramming more gears into the slushbox will get you more efficient operation.

[Daox]

I made a mistake. His Jeep is a 6 speed manual, not 5 speed auto. They are rated the same though.

Here is the comparison I came up with off of fueleconomy.gov. Looks like the 4wd to 2wd makes up a 2 mpg highway difference.

Sadly, the Grand Cherokee doesn't come with a manual, so I couldn't compare it real accurately.

[doclees]

As a 1995 Wrangler owner I will attest that this is a perfect platform to show that aerodynamics is the greatest factor in gas mileage. I average 22 mpg either suburbs or highway. Pulled the cage off the roof and went from 16 mpg to 20 mpg. Smaller thinner tires no significant change. Synthetic oil, free flow cat back, new plugs and KN air filter, no significant change. Tire pressure at 40 lbs over 36 adds 1-2 mpgs. Tail wind on the highway and I can hit 24 mpg. Some day I will add belly pans or air dam.