Comparison of OO Class 251 'Blue Pullman' models
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| Manufacturer | Tri-ang | Bachmann Branchline |
| Year model introduced | 1963 | 2012 |
| DCC Capability | DCC compatible but no socket. Complete rewire required - OO | DCC Ready 21-pin. 2 decoders required |
| Detailing | ||
| Bodyshell - factory-fitted separate details | ||
| Handrails | No |
Yes |
| Jumper cables | No |
Yes |
| Roof railing | No |
Yes |
| Vestibules | No |
Yes |
| Chassis/underframe detail | ||
| Battery box |
Yes |
Yes |
| Engine pipework | No |
Yes |
| Fuel tank |
Yes |
Yes |
| Pipework |
Yes |
No |
| Cab, footplate & interior detail | ||
| Detailed & painted | No |
Yes |
| Detailed guards compartment | No |
Yes |
| Glazing |
Yes |
Yes |
| Tables | No |
Yes |
| Window wipers | No |
Yes |
| Wheel "aesthetics" | ||
| Chemically-blackened |
Yes |
No |
| Bufferbeam detail (pre-fitted) | ||
| Cosmetic screw link coupling | No |
Yes |
| Pipework - pre-fitted to front | No |
Yes |
| Mechanical | ||
| Chassis construction |
Plastic & metal |
Plastic & metal |
| Loco-driven wheels (number of) |
4 wheels |
8 wheels |
| Minimum radius |
Radius 1 |
Radius 2 |
| Coupling socket/mounting | ||
| Drawbar coupling | No |
Yes |
| Fixed |
Yes |
No |
| Coupling type |
Tension lock |
Drawbar |
| Separating the body from the chassis |
Secured with one or more screws |
No |
| Electrical | ||
| Motor type |
3-pole |
Can motors with 1 flywheel in each power car |
| Motor location |
1 bogie mounted |
End of chassis |
| Power collection |
2 rail DC |
2 rail DC |
| Working lights | ||
| Cab light | No |
Yes |
| Directional headlights & tail lights | No |
Yes |
| Interior lighting | No |
Yes |
| Pickups |
Power bogie only |
All wheels |
| DCC speaker |
No provision for speaker |
Pre-fitted |
| Items in Stock | View | View |