Head to head
Ifor Williams HB510XL vs Ifor Williams P6
The Ifor Williams HB510XL is rated 2.5 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB510XL is rated 2.5 tonnes heavier gross.
Specifications side by side
| Ifor Williams HB510XL | Ifor Williams P6 | |
|---|---|---|
| Gross weight | 3500kg | 1000kg |
| Unladen weight | 1290kg | - |
| Payload | 2210kg | - |
| Internal length | 4.25m | - |
| Internal width | 1.74m | - |
| Axles | - | Single |
| Brakes | - | Braked |
| Size | - | 6ft x 4ft |
Sources: Ifor Williams HB510XL, Ifor Williams P6. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB510XL if...
- you want one that is rated 2.5 tonnes heavier gross
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Buy or hire the P6 if...
Ifor Williams P6, carried by UK dealers and hire companies listed on GetBrent for sale. The small Ifor Williams general purpose trailer and the forerunner of the current P6e. Householders and gardeners use it for tip runs, garden waste and DIY materials behind almost any car.
Full P6 specifications →Common questions
What is the difference between the Ifor Williams HB510XL and the Ifor Williams P6?
The Ifor Williams HB510XL is rated 2.5 tonnes heavier gross. The Ifor Williams HB510XL is a an extra-length double horsebox trailer; the Ifor Williams P6 is a small general purpose trailer, 6ft x 4ft.
Can I tow the Ifor Williams HB510XL or the Ifor Williams P6 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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