Head to head
Ifor Williams HB511 vs Ifor Williams P5
The Ifor Williams P5 is 859kg lighter empty. The Ifor Williams HB511 is rated 2.2 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB511 weighs 859kg more empty.
- Gross weight: the Ifor Williams HB511 is rated 2.2 tonnes heavier gross.
Specifications side by side
| Ifor Williams HB511 | Ifor Williams P5 | |
|---|---|---|
| Gross weight | 2,700kg | 500kg |
| Unladen weight | 1,000kg | 141kg |
| Brakes | Braked | Unbraked |
| Internal length | 3.52m | - |
| Internal width | 1.79m | - |
| Payload | - | 359kg |
| Internal bed | - | 1.53m x 1.02m |
Sources: Ifor Williams HB511, Ifor Williams P5. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB511 if...
- you want one that is rated 2.2 tonnes heavier gross
The wider step up from the HB506, for larger horses or owners who want more room in transit. The extra 12cm of internal width and 36cm of length cost 80kg unladen, which is worth checking against your tow vehicle before choosing it over the HB506.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Trek-Trailers Three Counties - Hereford
Buy or hire the P5 if...
- you want one that is 859kg 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 HB511 and the Ifor Williams P5?
The Ifor Williams P5 is 859kg lighter empty. The Ifor Williams HB511 is rated 2.2 tonnes heavier gross. The Ifor Williams HB511 is a two-horse trailer, twin axle, wider body; the Ifor Williams P5 is a the smallest unbraked domestic trailer Ifor Williams makes.
Which is lighter, the Ifor Williams HB511 or the Ifor Williams P5?
The Ifor Williams P5. It is 859kg lighter empty than the Ifor Williams HB511.
Can I tow the Ifor Williams HB511 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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