Engines

• There were two Cummins diesel options in 2003, both of which were 5.9 liters. The lesser of the two produces 250 horsepower (hp) at 2,900 rpm and 460 foot-pounds of torque at 1,400 rpm. The higher-rated engine produces 305 hp at 2,900 rpm and 555 foot-pounds of torque at 1,400 rpm.
  
  

Hauling

• The 2003 Dodge Ram 2500 Quad Cab has a maximum towing capacity from 12,950 lbs. to 13,550 lbs., depending on the options selected. The payload capacity, or the total weight the chassis can bear, is from 2,630 lbs. to 3,280 lbs., depending on the options selected.
  
  

Interior

• The 2003 Ram 2500 Quad Cab has 40.8 inches of front headroom, 40 inches of rear headroom, 41 inches of front legroom, 36.4 inches of rear legroom, 67 inches of front shoulder room, 66.7 inches of rear shoulder room, 65.1 inches of front hip room and 64.6 inches of rear hip room.