The 2014 Jeep Grand Cherokee is one of a handful of vehicles that is truly off-road worthy. For 2014 there are now a total of 5 different Jeep Grand Cherokee models with 4 engine choices. In this exclusive TFLcar first drive review we take the brand new diesel Grand Cherokee off-road to see how the massive amounts of diesel engine torque really work when the road disappears. Is the new and refreshed Jeep Grand Cherokee worth the premium price that the new Summit model now demands? That's a question that Roman and Nathan try to answer as they drive through the hills of Texas.