Head to head
Brian James Race Transporter 4 vs Ifor Williams TT3621
The Ifor Williams TT3621 is 190kg lighter empty and carries 190kg more. The Brian James Race Transporter 4 is 17cm wider inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Brian James Race Transporter 4 weighs 190kg more empty.
- Internal width: the Brian James Race Transporter 4 is 17cm wider inside.
- Payload: the Ifor Williams TT3621 carries 190kg more.
Specifications side by side
| Brian James Race Transporter 4 | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | from 1180kg | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
| Payload | up to 2320kg | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
| Internal width | 2.12m | 1.95m / 6'5" |
| Internal bed | 5.0m / 5.5m long | - |
| Axles | Twin | - |
| Internal length | - | 3.62m / 11'9" |
Sources: Brian James Race Transporter 4, Ifor Williams TT3621. 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 17cm 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 TT3621 if...
- you want one that is 190kg lighter empty
- you want one that carries 190kg more
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 Race Transporter 4 and the Ifor Williams TT3621?
The Ifor Williams TT3621 is 190kg lighter empty and carries 190kg more. The Brian James Race Transporter 4 is 17cm wider inside. The Brian James Race Transporter 4 is a an open twin-axle hydraulic tilt-bed car transporter; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which is lighter, the Brian James Race Transporter 4 or the Ifor Williams TT3621?
The Ifor Williams TT3621. It is 190kg lighter empty than the Brian James Race Transporter 4.
Which carries more, the Brian James Race Transporter 4 or the Ifor Williams TT3621?
The Ifor Williams TT3621, by 190kg.
Can I tow the Brian James Race Transporter 4 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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