Head to head
Brian James Race Box vs Ifor Williams TT3621
The Ifor Williams TT3621 carries 625kg more and is rated 500kg heavier gross. The Brian James Race Box is 38cm (1ft) longer inside.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams TT3621 carries 625kg more.
- Gross weight: the Ifor Williams TT3621 is rated 500kg heavier gross.
- Internal length: the Brian James Race Box is 38cm (1ft) longer inside.
Specifications side by side
| Brian James Race Box | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 3000kg | 3500kg |
| Payload | up to 1885kg | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
| Internal width | 1.95m | 1.95m / 6'5" |
| Internal length | 4.0m / 4.5m / 5.0m | 3.62m / 11'9" |
| Axles | Twin | - |
| Unladen weight | - | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
Sources: Brian James Race Box, Ifor Williams TT3621. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Race Box if...
- you want one that is 38cm (1ft) longer inside
Positioned for classic car owners and smaller motorsport teams who want their car fully enclosed and weatherproof but do not need the wider bed of the Race Sport or Race Transporter ranges. The narrower internal width suits a single classic or compact race car rather than a modern GT car.
Listed by
- Formula Trailers,, Brian-James Trailers Main Dealer in the SW UK - Wellington, Poole
Buy or hire the TT3621 if...
- you want one that carries 625kg more
- you want one that is rated 500kg 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 Race Box and the Ifor Williams TT3621?
The Ifor Williams TT3621 carries 625kg more and is rated 500kg heavier gross. The Brian James Race Box is 38cm (1ft) longer inside. The Brian James Race Box is a a fully enclosed twin-axle car transporter for classics and small race cars; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which carries more, the Brian James Race Box or the Ifor Williams TT3621?
The Ifor Williams TT3621, by 625kg.
Can I tow the Brian James Race Box 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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