Head to head
Brian James Race Box vs Ifor Williams Business Inabox
The Ifor Williams Business Inabox is rated 500kg heavier gross and is 23cm wider inside.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams Business Inabox is rated 500kg heavier gross.
- Internal width: the Ifor Williams Business Inabox is 23cm wider inside.
- Internal length: the Ifor Williams Business Inabox is 45cm (1.5ft) longer inside.
Specifications side by side
| Brian James Race Box | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 3000kg | 3500kg |
| Internal width | 1.95m | 2.18m |
| Internal length | 4.0m / 4.5m / 5.0m | 4.45m (Workshop M) |
| Payload | up to 1885kg | - |
| Axles | Twin | - |
| Unladen weight | - | 1900kg (Workshop M) |
| Overall length | - | 5.96m (Workshop M) |
Sources: Brian James Race Box, Ifor Williams Business Inabox. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Race Box if...
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 Business Inabox if...
- you want one that is rated 500kg heavier gross
- you want one that is 23cm wider inside
- you want one that is 45cm (1.5ft) longer 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 Box and the Ifor Williams Business Inabox?
The Ifor Williams Business Inabox is rated 500kg heavier gross and is 23cm wider inside. The Brian James Race Box is a a fully enclosed twin-axle car transporter for classics and small race cars; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Can I tow the Brian James Race Box 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.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.