|  | Class | NVR Number | Axle Formula | Number | Year in Service | Power [kW] | Tractive Effort [kN] | Max.Speed [km/h] | Traction Type | Voltage | 1st class | 2nd class | 
    
      |  | J15 | 
 | Ct | 1 | 1879 
 | 
 | 
 | 
 | S | Steam | --- | --- | 
    
      | Oldest steam locomotive of RPSI, nr. 186
(last active 2004-2013) 
 | 
    
      |  | V | 
 | 2'B | 1 | 1932 | 
 | 
 | 
 | S | Steam | --- | --- | 
    
      | Compound steam locomotive, former GNR(I)/GNRB
nr. 85 "Merlin", restored in 2014 and stored in 2025 (5 built) 
 | 
    
      |  | A | 
 | Co'Co' | 2 | 1955 | 750 | 205 | 120 | DE | Diesel | --- | --- | 
    
      | Former IE class A/001 diesel locomotives, nrs.
A3/003 and A39/039 | 
    
      |  | B 
 | 
 | Bo'Bo' | 1 
 | 1961 | 529 | 156 | 120 | DE | Diesel | --- | --- | 
    
      | Single cab diesel locomotive class B/121 used
for freight
trains, nr. B134 (under overhaul for RPSI in 2021/2022) 
 | 
    
      |  | E | 
 | C | 3 | 1962 | 299 | 105 | 40 | DH | Diesel | --- | --- | 
    
      | Former IE class E/421 diesel-hydraulic shunters,
nrs. 421/428/432 | 
    
      |  | G | 
 | B | 1 | 1962 | 119 | 
 | 40 | DH | Diesel | --- | --- | 
    
      | Former IE class G/611, small diesel-hydraulic
shunter, nr. G613 |