Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams GD84
The Ifor Williams GD84 is 2,050kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 800kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 2,050kg more empty.
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 800kg heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams GD84 | |
|---|---|---|
| Gross weight | 3500kg | 2700kg |
| Unladen weight | 2500kg | 450kg |
| Payload | - | 2250kg |
| Internal length | - | 2.55m |
| Internal width | - | 1.25m |
| Axles | - | Twin |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams GD84. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic Five Seats 3,500kg if...
- you want one that is rated 800kg heavier gross
A five-seat cab variant of the Sonic, aimed at families or small teams who want to travel together to competitions rather than sending a second car. It carries the same horse capacity as the standard Sonic.
Full Sonic Five Seats 3,500kg specifications →Buy or hire the GD84 if...
- you want one that is 2,050kg lighter empty
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.
Full GD84 specifications →Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams GD84?
The Ifor Williams GD84 is 2,050kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 800kg heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams GD84 is a a general-purpose dropside trailer.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams GD84?
The Ifor Williams GD84. It is 2,050kg lighter empty than the Equi-Trek Sonic Five Seats 3,500kg.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams GD84 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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