Head to head
Brian James A Transporter (A4) vs Ifor Williams TT3621
The Ifor Williams TT3621 is rated 1.5 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams TT3621 is rated 1.5 tonnes heavier gross.
Specifications side by side
| Brian James A Transporter (A4) | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 2,000kg to 3,000kg depending on variant | 3500kg |
| Bed | 3.7m x 1.8m up to 5.0m x 2.0m depending on variant | - |
| Brakes | Braked, tandem axle | - |
| Unladen weight | - | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
| Payload | - | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
| Internal length | - | 3.62m / 11'9" |
| Internal width | - | 1.95m / 6'5" |
Sources: Brian James A Transporter (A4), Ifor Williams TT3621. 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 TT3621 if...
- you want one that is rated 1.5 tonnes heavier gross
The largest Ifor Williams tipper. A 3.6m by 1.95m body is chosen for bulky, lighter loads - green waste, clearance and bark - where volume runs out before weight does, and it is a staple of plant and tool hire fleets. Formerly sold as the TT126.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Brian James A Transporter (A4) and the Ifor Williams TT3621?
The Ifor Williams TT3621 is rated 1.5 tonnes heavier gross. The Brian James A Transporter (A4) is a open flatbed car transporter, twin axle; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Can I tow the Brian James A Transporter (A4) or the Ifor Williams TT3621 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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