Head to head
Brian James Race Transporter 4 vs Ifor Williams Business Inabox
The Brian James Race Transporter 4 is 720kg lighter empty. The Ifor Williams Business Inabox is 6cm wider inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 720kg more empty.
- Internal width: the Ifor Williams Business Inabox is 6cm wider inside.
Specifications side by side
| Brian James Race Transporter 4 | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | from 1180kg | 1900kg (Workshop M) |
| Internal width | 2.12m | 2.18m |
| Payload | up to 2320kg | - |
| Internal bed | 5.0m / 5.5m long | - |
| Axles | Twin | - |
| Internal length | - | 4.45m (Workshop M) |
| Overall length | - | 5.96m (Workshop M) |
Sources: Brian James Race Transporter 4, Ifor Williams Business Inabox. 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 720kg lighter empty
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 Business Inabox if...
- you want one that is 6cm wider inside
A trailer shell fitted out as a mobile workshop, shop or catering unit rather than a load carrier. Tradespeople and mobile caterers buy it to take a fitted-out workspace to a site rather than build one into a van.
Listed by
- Norfolk Trailers - Norwich
Common questions
What is the difference between the Brian James Race Transporter 4 and the Ifor Williams Business Inabox?
The Brian James Race Transporter 4 is 720kg lighter empty. The Ifor Williams Business Inabox is 6cm wider inside. The Brian James Race Transporter 4 is a an open twin-axle hydraulic tilt-bed car transporter; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Which is lighter, the Brian James Race Transporter 4 or the Ifor Williams Business Inabox?
The Brian James Race Transporter 4. It is 720kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Brian James Race Transporter 4 or the Ifor Williams Business Inabox 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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