Head to head
Brian James A4 Transporter vs Ifor Williams Business Inabox
The Brian James A4 Transporter is 1,130kg lighter empty. The Ifor Williams Business Inabox is rated 500kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 1,130kg more empty.
- Gross weight: the Ifor Williams Business Inabox is rated 500kg heavier gross.
Specifications side by side
| Brian James A4 Transporter | Ifor Williams Business Inabox | |
|---|---|---|
| Gross weight | 3000kg | 3500kg |
| Unladen weight | 770kg | 1900kg (Workshop M) |
| Payload | 2230kg | - |
| Internal bed | 4.5m x 2.0m | - |
| Axles | Twin axle | - |
| Internal length | - | 4.45m (Workshop M) |
| Internal width | - | 2.18m |
| Overall length | - | 5.96m (Workshop M) |
Sources: Brian James A4 Transporter, Ifor Williams Business Inabox. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the A4 Transporter if...
- you want one that is 1,130kg lighter empty
The A4 Transporter suits driving schools, small dealers and enthusiasts who need to move one car at a time behind a car-derived tow vehicle, offering a simple twin-axle bed without the cost of a beavertail or enclosed body. Its compact size makes it easier to store and manoeuvre than the longer trailers in the A Transporter range.
Listed by
- Compass Trailers - Lewes, Ringmer
- Saxons Trailers - Westerham, Biggin Hill
- R M Trailer Centre - Middlesbrough, North Ormesby
- 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
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 A4 Transporter and the Ifor Williams Business Inabox?
The Brian James A4 Transporter is 1,130kg lighter empty. The Ifor Williams Business Inabox is rated 500kg heavier gross. The Brian James A4 Transporter is a twin-axle open car transporter trailer from Brian James' A Transporter range, built for towing one car on a 4.5m bed.; the Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit.
Which is lighter, the Brian James A4 Transporter or the Ifor Williams Business Inabox?
The Brian James A4 Transporter. It is 1,130kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Brian James A4 Transporter 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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