Comparison of OO 4-6-2 Class 8P Princess Royal LMS models
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| Manufacturer | Tri-ang | Tri-ang | Hornby | Hornby | Hornby | Hornby |
| Year model introduced | 1950 | 1970 | 1984 | 2001 | 2005 | 2019 |
| DCC Capability | DCC compatible but no socket. Complete rewire required - OO | DCC compatible but no socket | Motor fitted but no DCC socket. Ringfield motor | DCC compatible but no socket | DCC Ready. 8-pin socket | DCC Ready. 8-pin socket |
| Detailing | ||||||
| Bodyshell - factory-fitted separate details | ||||||
| Body supports | No | No | No | No | No |
Yes |
| Chimney | No | No | No | No | No |
Yes |
| Handrails | No | No |
Yes |
Yes |
Yes |
Yes |
| Injector | No | No | No | No | No |
Yes |
| Injector pipework | No | No | No | No | No |
Yes |
| Lamp irons | No | No | No |
Yes |
Yes |
Yes |
| Pipe work | No | No | No | No | No |
Yes |
| Regulator linkage | No | No | No | No | No |
Yes |
| Release valve | No | No | No | No | No |
Yes |
| Reverser | No | No |
Yes |
Yes |
Yes |
Yes |
| Roof hatch | No | No | No | No | No |
Yes |
| Safety valves - turned brass |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Smokebox door dart | No | No | No |
Yes |
Yes |
Yes |
| Vents | No | No | No | No | No |
Yes |
| Water scoop | No | No | No | No | No |
Yes |
| Whistle - turned brass | No | No | No |
Yes |
Yes |
Yes |
| Chassis/underframe detail | ||||||
| Brake rigging chassis | No | No |
Yes |
Yes |
Yes |
No |
| Correct-thickness "stamped" rods | No | No | No | No | No |
Yes |
| Fluted connecting rods with oily finish | No | No | No | No | No |
Yes |
| Lubricator mechanism | No | No | No | No | No |
Yes |
| Pipework | No | No | No | No | No |
Yes |
| Sand boxes | No | No | No | No | No |
Yes |
| Sanding gear | No | No | No | No | No |
Yes |
| Sprung front bogie | No | No | No | No | No |
Yes |
| Cab, footplate & interior detail | ||||||
| Detailed & painted | No | No | No | No | No |
Yes |
| Footplate doors | No | No | No | No | No |
Yes |
| Glazing | No | No | No |
Yes |
Yes |
Yes |
| Tender | ||||||
| Has easy-to-use coupling to loco |
Yes |
Yes |
Yes |
No | No |
Yes |
| Has enclosure for speaker | No | No | No | No | No |
Yes |
| Houses digital decoder | No | No | No | No | No |
Yes |
| Houses PCB | No | No | No | No | No |
Yes |
| Wheel "aesthetics" | ||||||
| Chemically-blackened | No | No | No | No | No |
Yes |
| Coloured-plastic | No | No |
Yes |
Yes |
Yes |
No |
| Metal-pin point bearings | No | No | No | No | No |
Yes |
| Nickel-plated | No | No |
Yes |
No | No | No |
| Painted | No | No |
Yes |
No | No |
Yes |
| Solid-spoked wheels |
Yes |
Yes |
No | No | No | No |
| Bufferbeam detail (pre-fitted) | ||||||
| Cosmetic coupling - hook only | No | No | No | No | No |
Yes |
| Lifeguard | No | No | No | No | No |
Yes |
| Pipework - pre-fitted to front | No | No | No | No | No |
Yes |
| Pipework - pre-fitted to rear | No | No | No | No | No |
Yes |
| Sprung buffers | No | No | No | No | No |
Yes |
| Bufferbeam detail (in detailing pack) | ||||||
| Pipework (for rear) | No | No |
Yes |
No | No | No |
| Detail pack also contains... | ||||||
| Brake rigging | No | No | No | No | No |
Yes |
| Mechanical | ||||||
| Body Construction | No | No | No | No | No |
Plastic with metal parts |
| Working cosmetic features | ||||||
| Roof vent | No | No | No | No | No |
Yes |
| Chassis construction |
Diecast |
Diecast |
Plastic & metal |
Plastic & metal |
Plastic & metal |
Heavy diecast |
| Loco-driven wheels (number of) |
2 wheels |
2 wheels |
None |
2 wheels |
2 wheels |
6 wheels |
| Minimum radius |
Radius 1 |
Radius 1 |
Radius 2 |
Radius 2 |
Radius 2 |
Radius 2 |
| Coupling socket/mounting | ||||||
| Fixed |
Yes |
Yes |
Yes |
No | No | No |
| NEM pockets | No | No | No |
Yes |
Yes |
Yes |
| Coupling type |
Tension lock |
Tension lock |
Tension lock |
Tension lock |
Tension lock |
Tension lock |
| Weighting (to assist adhesion) | ||||||
| Within boiler | No | No | No | No | No |
Yes |
| Within chassis | No | No | No | No | No |
Yes |
| Within tender | No | No |
Yes |
No | No |
Yes |
| Separating the body from the chassis |
Secured with one or more screws |
Secured with one or more screws |
Secured with one or more screws |
No | No |
Secured with one or more screws |
| Electrical | ||||||
| Motor type |
3-pole |
X04 |
Ringfield |
5-pole (standard) |
5-pole (standard) |
5-pole with flywheel |
| Motor location |
Locomotive |
Locomotive |
Tender |
Locomotive |
Locomotive |
Locomotive |
| Power collection |
2 rail DC |
2 rail DC |
2 rail DC |
2 rail DC |
2 rail DC |
2 rail DC |
| Working lights | ||||||
| Firebox flicker | No | No | No | No | No |
Yes |
| Pickups |
2 out of 3 axles |
2 out of 3 axles |
No |
Driving wheels only |
Driving wheels only |
Driving wheels and tender wheels |
| DCC speaker |
No provision for speaker |
No provision for speaker |
No provision for speaker |
No provision for speaker |
No provision for speaker |
Provision for 28mm round speaker |
| Items in Stock | View | View | View | View | View | View |
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