Head to head
Brian James A Transporter (A4) vs Ifor Williams HB403
The Brian James A Transporter (A4) is rated 400kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Brian James A Transporter (A4) is rated 400kg heavier gross.
Specifications side by side
| Brian James A Transporter (A4) | Ifor Williams HB403 | |
|---|---|---|
| Gross weight | 2,000kg to 3,000kg depending on variant | 1600kg |
| Bed | 3.7m x 1.8m up to 5.0m x 2.0m depending on variant | - |
| Brakes | Braked, tandem axle | - |
| Unladen weight | - | 767kg |
| Payload | - | 833kg |
| Internal length | - | 3.08m |
| Internal width | - | 1.30m |
Sources: Brian James A Transporter (A4), Ifor Williams HB403. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the A Transporter (A4) if...
- you want one that is rated 400kg heavier gross
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 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 A Transporter (A4) and the Ifor Williams HB403?
The Brian James A Transporter (A4) is rated 400kg heavier gross. The Brian James A Transporter (A4) is a open flatbed car transporter, twin axle; the Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer.
Can I tow the Brian James A Transporter (A4) 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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