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3.9L Magnum V6 Explained

Chrysler's Magnum Series engine is, more or less, the second generation of the LA-series small block. In early form the Magnum engine was used exclusively in Dodge trucks such as the Dakota, Ram, Durango and Ram Van. As quickly as it came out, the Jeep Grand Cherokee also got them as an option. The production run of the Magnum engine series was from 1992-2003. Aftermarket support for the Magnum series has grown over the years and with proper maintenance, they will last forever.

Along with the above V8, the 3.9L (239 CID) Magnum V6 was also new, which basically was a 5.2 with two cylinders removed. Like that 5.2, horsepower and torque were greater during ts first two years. Those numbers are 180 on the horsepower side and 220 on the torque side. For 1994, output fell to 175hp while the same torque rating was retained. Torque was bumped up for the 1997 model year to 225 ft/lbs.

3.9 Bore x Stroke= 3.91" x 3.31"
3.9 Compression Ratio= 9.1:1
3.9 Firing Order= 1-6-5-4-3-2

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