The walker railmotors were brought into service to give faster, better service to country places at less of a cost and were only built to last 10 yeas of service but lasted much longer. All of the walkers had a spare power unit.The spare for the 280's was 92 RM.
Drive Type: Diesel Hydraulic
Engine: (2x) Gardner 8LW
Horse Power: 140hp (per engine)
280hp total
Max rated speed: 60mph (96km/h)
Seating Capacity: 38 first class 56 second class