The NZR RM class 88-seaters were a class of railcar used in New Zealand. New Zealand Government Railways (NZR) classified them as RM (Rail Motor), the notation used for all railcars, numbering the 35 sets from RM100 to RM134. They were the most numerous railcars in NZR service. Their purchase and introduction saw the demise of steam-hauled provincial passenger trains and mixed trains, and was part of a deliberate effort to modernise NZR passenger services at a time of increasing competition from private motor vehicles. Being diesel powered and lighter the railcars were less expensive to operate and able to maintain quicker timetables, although became plagued with mechanical and electrical problems, with a number of the class eventually being turned into depowered locomotive-hauled carriage