Detroit Auto Show: Chrysler Unveils 2014 Jeep Grand Cherokee, Patriot and Compass image

Jeep will unveil the updated versions of its compact Compass and Patriot , as well as its best-selling Grand Cherokee, today at the Detroit Auto Show.

Chrysler’s Jeep brand will bring the upgraded versions of its models, including a new diesel engine and eight-speed automatic transmission for its Grand Cherokee, mild facelifts for the Compass and Grand Cherokee, and also new six-speed automatic transmission for the Patriot and Compass.

Fiat, Chrysler’s parent, has been investing billions of dollars to expand Jeeps’ product range and increase the company’s overseas presence. Jeep’s Grand Cherokee, which is manufactured in Detroit, is the automaker’s best-selling model, with sales up 21% in 2012 to 154,734 units. The 2014 Grand Cherokee will be offered with a revised front end and will also add a new top-of-the-line Summit edition.

The model will come with an optional 3.0-liter six-cylinder EcoDiesel engine, which features 240 horsepower and offers 420 pound-feet of torque, and an eight-speed automatic transmission. The EPA rated the model at 21 miles per gallon in the city and 30 miles per gallon on the highway. The fully redesigned Grand Cherokee will not be seen sooner than 2016. Chrysler also plans to introduce in 2014 a larger, more luxurious seven-passenger derivative, which is expected to resurrect the Grand Wagoneer name.

The 2014 Compass comes with several interior and exterior updates, while the 2014 Patriot comes only with a new transmission. Both models share the now discontinued Dodge Caliber platform. As the two models have been slow sellers, Jeep plans to replace them with a compact model in 2014, which, according to anonymous sources, will share common underbody architecture with the Fiat-based Dodge Dart sedan.