Head to head
Brian James Race Transporter 4 vs Ifor Williams HB506
The Brian James Race Transporter 4 is rated 900kg heavier gross and is 45cm (1.5ft) wider inside. The Ifor Williams HB506 is 260kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Brian James Race Transporter 4 is rated 900kg heavier gross.
- Unladen weight: the Brian James Race Transporter 4 weighs 260kg more empty.
- Internal width: the Brian James Race Transporter 4 is 45cm (1.5ft) wider inside.
Specifications side by side
| Brian James Race Transporter 4 | Ifor Williams HB506 | |
|---|---|---|
| Gross weight | 3500kg | 2,600kg |
| Unladen weight | from 1180kg | 920kg |
| Internal width | 2.12m | 1.67m |
| Payload | up to 2320kg | - |
| Internal bed | 5.0m / 5.5m long | - |
| Axles | Twin | - |
| Internal length | - | 3.16m |
| Brakes | - | Braked |
Sources: Brian James Race Transporter 4, Ifor Williams HB506. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Race Transporter 4 if...
- you want one that is rated 900kg heavier gross
- you want one that is 45cm (1.5ft) wider inside
Aimed at motorsport teams and vehicle recovery operators who need a hydraulic tilt-bed for easy low loading of a single car. It is the entry point into the numbered Race Transporter range, below the 5, 6 and 7.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Bicester Trailer Centre - Bicester
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Buy or hire the HB506 if...
- you want one that is 260kg lighter empty
The mainstream two-horse trailer in Britain, used by private owners and small yards. Its comparatively low unladen weight for the class is the practical point: it widens the range of 4x4s and large SUVs that can legally and comfortably tow it.
Listed by
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Brian James Race Transporter 4 and the Ifor Williams HB506?
The Brian James Race Transporter 4 is rated 900kg heavier gross and is 45cm (1.5ft) wider inside. The Ifor Williams HB506 is 260kg lighter empty. The Brian James Race Transporter 4 is a an open twin-axle hydraulic tilt-bed car transporter; the Ifor Williams HB506 is a two-horse trailer, twin axle.
Which is lighter, the Brian James Race Transporter 4 or the Ifor Williams HB506?
The Ifor Williams HB506. It is 260kg lighter empty than the Brian James Race Transporter 4.
Can I tow the Brian James Race Transporter 4 or the Ifor Williams HB506 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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