Head to head
Brian James A Transporter (A4) vs Ifor Williams HB506
The Ifor Williams HB506 is rated 600kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB506 is rated 600kg heavier gross.
Specifications side by side
| Brian James A Transporter (A4) | Ifor Williams HB506 | |
|---|---|---|
| Gross weight | 2,000kg to 3,000kg depending on variant | 2,600kg |
| Brakes | Braked, tandem axle | Braked |
| Bed | 3.7m x 1.8m up to 5.0m x 2.0m depending on variant | - |
| Unladen weight | - | 920kg |
| Internal length | - | 3.16m |
| Internal width | - | 1.67m |
Sources: Brian James A Transporter (A4), Ifor Williams HB506. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the A Transporter (A4) if...
One of the most common car trailers in Britain, bought by trade and private owners for moving road cars, project cars and small vans. The reason it sells is the spread of bed length and gross weight combinations, which lets you match the trailer to the tow car rather than the other way round.
Listed by
- Fieldfare Trailer Centre - Salisbury
- Bicester Trailer Centre - Bicester
- Trek-Trailers Three Counties - Hereford
Buy or hire the HB506 if...
- you want one that is rated 600kg heavier gross
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 A Transporter (A4) and the Ifor Williams HB506?
The Ifor Williams HB506 is rated 600kg heavier gross. The Brian James A Transporter (A4) is a open flatbed car transporter, twin axle; the Ifor Williams HB506 is a two-horse trailer, twin axle.
Can I tow the Brian James A Transporter (A4) 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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