Head to head
Ifor Williams GD84 vs Ifor Williams HB510XL
The Ifor Williams GD84 is 840kg lighter empty. The Ifor Williams HB510XL is 1.7m (5.5ft) longer inside and is 49cm (1.5ft) wider inside.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB510XL weighs 840kg more empty.
- Internal length: the Ifor Williams HB510XL is 1.7m (5.5ft) longer inside.
- Internal width: the Ifor Williams HB510XL is 49cm (1.5ft) wider inside.
- Gross weight: the Ifor Williams HB510XL is rated 800kg heavier gross.
- Payload: the Ifor Williams GD84 carries 40kg more.
Specifications side by side
| Ifor Williams GD84 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2700kg | 3500kg |
| Unladen weight | 450kg | 1290kg |
| Payload | 2250kg | 2210kg |
| Internal length | 2.55m | 4.25m |
| Internal width | 1.25m | 1.74m |
| Axles | Twin | - |
Sources: Ifor Williams GD84, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GD84 if...
- you want one that is 840kg lighter empty
- you want one that carries 40kg more
A everyday farm and smallholding trailer for moving loose loads, logs or small livestock behind a 4x4 or pickup, chosen over the single-axle GD84 when the extra payload of a twin-axle chassis is needed.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Buy or hire the HB510XL if...
- you want one that is 1.7m (5.5ft) longer inside
- you want one that is 49cm (1.5ft) wider inside
- you want one that is rated 800kg 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
Common questions
What is the difference between the Ifor Williams GD84 and the Ifor Williams HB510XL?
The Ifor Williams GD84 is 840kg lighter empty. The Ifor Williams HB510XL is 1.7m (5.5ft) longer inside and is 49cm (1.5ft) wider inside. The Ifor Williams GD84 is a a general-purpose dropside trailer; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams GD84 or the Ifor Williams HB510XL?
The Ifor Williams GD84. It is 840kg lighter empty than the Ifor Williams HB510XL.
Which carries more, the Ifor Williams GD84 or the Ifor Williams HB510XL?
The Ifor Williams GD84, by 40kg.
Can I tow the Ifor Williams GD84 or the Ifor Williams HB510XL 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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