The 2500 in regular cab has an 8ft cargo bed and is 229.7-inches long. The quad cab comes either with a 6.3ft or 8ft cargo bed. The standard engine options are a Cummins 325 hp 5.9-liter turbo-diesel inline-six or the 235 hp 4.7-liter Hemi V-8. The Power Wagon edition comes with a 345 hp 5.7-liter Hemi V-8. For all the engines a six-speed manual or five-speed automatic is available. Other performance parts include locking front and rear differentials and polished aluminum 17-inch wheels.For 2006, the Dodge Ram 2500 is largely redesigned. It has also been modestly restyled and the interior has been upgraded.