Compare N 4-8-8-4 Class 4000 'Big Boy' UP
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| Manufacturer | Athearn | Broadway Limited Imports | Kato |
| Year model introduced | 2008 | 2022 | 2023 |
| DCC Capability | DCC fitted, with sound | DCC fitted, with sound | DCC compatible. PCB swap required |
| Detailing | |||
| Bodyshell - factory-fitted separate details | |||
| Bell |
Yes |
No |
Yes |
| Bodyside Steps | No | No |
Yes |
| Boiler supports |
Yes |
No | No |
| Chimney |
Yes |
No |
Yes |
| Coal rails |
Yes |
No |
Yes |
| Company branding |
Yes |
No |
Yes |
| Cylindrical vents | No | No |
Yes |
| Dome | No | No |
Yes |
| Drain cocks |
Yes |
No |
Yes |
| Handrails |
Yes |
No |
Yes |
| Headlamp |
Yes |
No |
Yes |
| Injector |
Yes |
No | No |
| Injector pipework |
Yes |
No | No |
| Lamp irons | No | No |
Yes |
| Lubricator mechanism | No | No |
Yes |
| Numberplates - plastic - pre-fitted |
Yes |
No |
Yes |
| Pipe work |
Yes |
No |
Yes |
| Regulator linkage | No | No |
Yes |
| Release valve | No | No |
Yes |
| Reverser |
Yes |
No |
Yes |
| Roof hatch | No | No |
Yes |
| Safety valve |
Yes |
No |
Yes |
| Shed plates - etched | No | No |
Yes |
| Smoke deflectors |
Yes |
No | No |
| Tail lamp |
Yes |
No | No |
| Tender ladder |
Yes |
No |
Yes |
| Walking platforms |
Yes |
No |
Yes |
| Whistle |
Yes |
No |
Yes |
| Chassis/underframe detail | |||
| Air tank |
Yes |
No | No |
| Brake rigging chassis | No | No |
Yes |
| Correct-thickness "stamped" rods |
Yes |
No |
Yes |
| Fluted connecting rods with oily finish |
Yes |
No |
Yes |
| Footsteps |
Yes |
No |
Yes |
| Framework | No | No |
Yes |
| Handbrake wheel/ lever |
Yes |
No | No |
| Inside valve gear | No | No |
Yes |
| Inside valve gear (cosmetic) |
Yes |
No | No |
| Lubricator mechanism | No | No |
Yes |
| No visible gap between front-bogie & frames |
Yes |
No | No |
| Pipework |
Yes |
No |
Yes |
| Sanding gear | No | No |
Yes |
| Sprung front bogie |
Yes |
No | No |
| Cab, footplate & interior detail | |||
| Detailed & painted |
Yes |
No |
Yes |
| Glazing |
Yes |
No |
Yes |
| Tender | |||
| Has easy-to-use coupling to loco | No | No |
Yes |
| Has enclosure for speaker | No | No |
Yes |
| Houses digital decoder |
Yes |
No |
Yes |
| Houses PCB |
Yes |
No |
Yes |
| Permanently coupled to locomotive |
Yes |
No | No |
| Wheel "aesthetics" | |||
| Chemically-blackened |
Yes |
No |
Yes |
| Metal-pin point bearings |
Yes |
No |
Yes |
| Painted |
Yes |
No | No |
| Bufferbeam detail (pre-fitted) | |||
| Cowcatchers | No | No |
Yes |
| Lifeguard |
Yes |
No | No |
| Pipework - pre-fitted to front | No | No |
Yes |
| Pipework - pre-fitted to rear | No | No |
Yes |
| Mechanical | |||
| Body Construction |
Plastic with metal parts |
No |
Plastic with metal parts |
| Chassis construction |
Heavy diecast |
No |
Heavy diecast |
| Loco-driven wheels (number of) |
16 wheels |
No |
16 wheels |
| Minimum radius |
Radius 3 |
No |
Radius 2 |
| Coupling socket/mounting | |||
| NEM pockets | No | No |
Yes |
| Non-NEM socket |
Yes |
No | No |
| Coupling type |
Knuckle Coupling |
No |
N gauge Knuckle buckeye |
| Weighting (to assist adhesion) | |||
| Within boiler | No | No |
Yes |
| Within chassis |
Yes |
No |
Yes |
| Within tender | No | No |
Yes |
| Separating the body from the chassis |
Secured with one or more screws |
No |
Secured with one or more screws |
| Electrical | |||
| Motor type |
5-pole with two flywheels |
No |
2 x Coreless motors with flywheels |
| Motor location |
Locomotive |
No |
Locomotive |
| Power collection |
2 rail DC |
No |
2 rail DC |
| Working lights | |||
| Directional headlights (no tail lights) |
Yes |
No | No |
| Headlamps | No | No |
Yes |
| Headlights (independent) |
Yes |
No | No |
| Tail lights (independent) |
Yes |
No | No |
| Pickups |
Driving wheels and tender wheels |
No |
Driving wheels and tender wheels |
| DCC speaker |
Pre-fitted |
No |
Provision for a speaker (dimensions unknown) |
| Items in Stock | View | View | View |