It may not win many street races, but the 2006 Jeep Commander will certainly leave many wannabes in its off-road dust. That is, of course, if the 5.7-liter Hemi V8 is bolted in. That's the top-of-the-line motor available in the Commander, one that puts out 330 horsepower at 5,000 rpm and 375 lb.-ft. of torque at 4,000 rpm. The Hemi features a multi-displacement system (MDS) which shuts down four of the cylinders when less power is needed, such as when cruising on the highway, all in an effort to increase fuel economy. There's a smaller 4.7-liter V8 that's also available, good for 235 horsepower at 4,500 rpm and 305 lb.-ft. of torque at 3,600 rpm. Finally, the base engine, a 3.7-liter V6, generates 210 horsepower at 5,200 rpm and 235 lb.-ft. of torque at 4,000 rpm.