Head to head
Ifor Williams Business Inabox vs Ifor Williams P5
The Ifor Williams P5 is 1,759kg lighter empty. The Ifor Williams Business Inabox is rated 3 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams Business Inabox weighs 1,759kg more empty.
- Gross weight: the Ifor Williams Business Inabox is rated 3 tonnes heavier gross.
Specifications side by side
| Ifor Williams Business Inabox | Ifor Williams P5 | |
|---|---|---|
| Gross weight | 3500kg | 500kg |
| Unladen weight | 1900kg (Workshop M) | 141kg |
| Internal length | 4.45m (Workshop M) | - |
| Internal width | 2.18m | - |
| Overall length | 5.96m (Workshop M) | - |
| Payload | - | 359kg |
| Internal bed | - | 1.53m x 1.02m |
| Brakes | - | Unbraked |
Sources: Ifor Williams Business Inabox, Ifor Williams P5. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Business Inabox if...
- you want one that is rated 3 tonnes 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
Buy or hire the P5 if...
- you want one that is 1,759kg lighter empty
A light general-purpose trailer for domestic buyers moving garden waste, small loads or a mower, chosen for its low unladen weight so it can be towed by almost any car.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Common questions
What is the difference between the Ifor Williams Business Inabox and the Ifor Williams P5?
The Ifor Williams P5 is 1,759kg lighter empty. The Ifor Williams Business Inabox is rated 3 tonnes heavier gross. The Ifor Williams Business Inabox is a trailer-based mobile workshop, boxvan or catering/retail unit; the Ifor Williams P5 is a the smallest unbraked domestic trailer Ifor Williams makes.
Which is lighter, the Ifor Williams Business Inabox or the Ifor Williams P5?
The Ifor Williams P5. It is 1,759kg lighter empty than the Ifor Williams Business Inabox.
Can I tow the Ifor Williams Business Inabox or the Ifor Williams P5 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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