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2019 Jeep Wrangler: Engines, Gasoline and Diesel

2019 Wrangler JL engine bay

Bob Sheaves, who was responsible for 4x4 suspension design at the Jeep/Truck Engineering's PreProgram Engineering Department from the AMC days until 1993, wrote:

Lets take performance requirements first. Just what does Wrangler have to do?

To answer this you need to refer back to an SAE spec called J688 (superceded by J2188, but the 688 spec is easier to understand).

J688 predicts vehicle performance in highway speeds, fuel consumption, drag, and other variables. GM Truck and Bus division used to have a publicly available guide that showed how to specify what equipment to choose so it would meet the customer’s needs.

Chrysler’s most likely options

patent for heads

Currently, the rumor mill has two engines front and center:

2.8 liter VM diesel

DIESELSFiat L424VM 2.8 Gas. V6Alfa 2.2 diesel
Horsepower200197~ 292178
Torque (lb-ft)368368260332

Using the eight-speed automatic should allow diesels to be more practical, despite their relatively low horsepower and power range. It also makes turbocharged four-cylinders less of a burden, thanks to the combination of a lower first gear and a higher top gear. The second-generation eight-speed 850RE has been confirmed for gasoline engines, with diesels getting a ZF-built eight-speed.

Torson AWD in ZF aautomatic transmission

Engineers would probably prefer to stick with just four-cylinders, to allow more room for suspension articulation and easy packaging, but customers are likely to demand a six even if the four-cylinder can produce more horsepower and torque. That said, perhaps in 2030, buyers will see a four-cylinder diesel and four-cylinder supercharged choice, with an even more capable suspension.

How to build it?


Steel or aluminum?

New suspension

Unit-body, frame...?
2018 Jeep Wrangler
Open or fixed top?
Weight and strength
2018 Jeep
True Jeep

Original Jeep
Allpar Jeep Home

Related Jeep Wrangler pages

Inside the Wrangler



Variants and related...

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