The Dodge Ram has been extensively re-engineered for 2006. It has also been modestly restyled and the interior has been upgraded., The bumper fascia, grille, headlamps, fenders and wheels are all new, but far more significant are less visible improvements, including a new hydroformed frame that's boxed its full length to provide more strength than in any previous Ram. You can't see the new suspension and body mounts, either, but they improve ride, handling, and quietness., Inside the '06 Ram, the instrument panel, center console and seats have been redesigned for more car-like comfort, while new radios and entertainment features help the miles roll on by., Those miles will roll quicker still when you order the Hemi engine, which has drawn much attention for its power and efficiency as well as the heritage its name evokes. It is an exceptionally good engine, smooth and very responsive. For 2006, the Hemi features the new Multi-Displacement System (MDS), which shuts down four of the Hemi's eight cylinders when they are not needed. Dodge claims the switchover is seamless, and that fuel economy is improved by as much as 20 percent. Step on the gas, however, and the cylinders reawaken, ready to deliver the 345 peak ponies that make the Hemi-powered Ram the most potent mass-production light-duty pickup on the market. Adding to the Hemi's responsiveness is a five-speed automatic transmission