Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams GH Plant with DigaDoc
The Ifor Williams GH Plant with DigaDoc is 1,891kg 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 1,891kg 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 GH Plant with DigaDoc | |
|---|---|---|
| Gross weight | 3500kg | 2700kg |
| Unladen weight | 2500kg | 609kg |
| Internal bed | - | 2.79m x 1.31m |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams GH Plant with DigaDoc. 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.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Three Counties - Hereford
Buy or hire the GH Plant with DigaDoc if...
- you want one that is 1,891kg lighter empty
Bought by plant hire and groundworks firms that need to prove what left the yard and where it went, since DigaDoc records load movements electronically on top of the standard GH plant trailer chassis. It is the same GH94 base trailer as the plain GH94, with the tracking hardware added.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams GH Plant with DigaDoc?
The Ifor Williams GH Plant with DigaDoc is 1,891kg 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 GH Plant with DigaDoc is a a plant trailer fitted with the manufacturer's DigaDoc load-tracking system.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams GH Plant with DigaDoc?
The Ifor Williams GH Plant with DigaDoc. It is 1,891kg 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 GH Plant with DigaDoc 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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