Head to head
Brian James C4 Transporter vs Ifor Williams HB403
The Brian James C4 Transporter is a car transporter trailer. The Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer.
Last reviewed 13 September 2026
Specifications side by side
| Brian James C4 Transporter | Ifor Williams HB403 | |
|---|---|---|
| Gross weight | 2000-2600kg (range across C4 variants) | 1600kg |
| Deck length | 12ft 2in (3.7m) loading area, up to 16ft overall | - |
| Deck width | 5ft 10in - 6ft | - |
| Axles | 2 | - |
| Ramps | 8ft loading ramps included | - |
| Unladen weight | - | 767kg |
| Payload | - | 833kg |
| Internal length | - | 3.08m |
| Internal width | - | 1.30m |
Sources: Brian James C4 Transporter, Ifor Williams HB403. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the C4 Transporter if...
A twin-axle trailer for moving a single car, van or small plant item, used by garages, racers and recovery firms. It is light enough for many family cars to tow while still carrying a saloon or hatchback on its own wheels.
Listed by
- Lancaster trailer hire - ELY
- Derby Trailer Hire Limited - Derby
Buy or hire the HB403 if...
The smallest trailer in the HB horsebox range, bought by owners of a single horse or a couple of ponies who want the lightest legal option that can still be towed by a mid-size car.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Brian James C4 Transporter and the Ifor Williams HB403?
The Brian James C4 Transporter is a car transporter trailer; the Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer.
Can I tow the Brian James C4 Transporter or the Ifor Williams HB403 on a car licence?
Yes, as far as the licence goes. Both are rated at or under 3,500kg gross, and a car (B) licence has covered towing up to 3,500kg since 16 December 2021. Your car still has to be rated to tow the loaded weight - check the handbook or the VIN plate.
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