Head to head
Brian James C4 Transporter vs Ifor Williams HB510XL
The Brian James C4 Transporter is a car transporter trailer. The Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Last reviewed 13 September 2026
Specifications side by side
| Brian James C4 Transporter | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2000-2600kg (range across C4 variants) | 3500kg |
| 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 | - | 1290kg |
| Payload | - | 2210kg |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Brian James C4 Transporter, Ifor Williams HB510XL. 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 HB510XL if...
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Brian James C4 Transporter and the Ifor Williams HB510XL?
The Brian James C4 Transporter is a car transporter trailer; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Can I tow the Brian James C4 Transporter or the Ifor Williams HB510XL 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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