Head to head
Equi-Trek Sonic 3,500kg vs Ifor Williams P5
The Ifor Williams P5 is 2,179kg lighter empty. The Equi-Trek Sonic 3,500kg is rated 3 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic 3,500kg weighs 2,179kg more empty.
- Gross weight: the Equi-Trek Sonic 3,500kg is rated 3 tonnes heavier gross.
Specifications side by side
| Equi-Trek Sonic 3,500kg | Ifor Williams P5 | |
|---|---|---|
| Gross weight | 3500kg | 500kg |
| Unladen weight | 2320kg | 141kg |
| Payload | - | 359kg |
| Internal bed | - | 1.53m x 1.02m |
| Brakes | - | Unbraked |
Sources: Equi-Trek Sonic 3,500kg, Ifor Williams P5. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic 3,500kg if...
- you want one that is rated 3 tonnes heavier gross
A compact motorised horsebox pitched as easy to drive day to day, for owners of one or two horses who want a small horsebox rather than a trailer and tow car. It is one of Equi-Trek's lower-cost motorised models.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Buy or hire the P5 if...
- you want one that is 2,179kg 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 Equi-Trek Sonic 3,500kg and the Ifor Williams P5?
The Ifor Williams P5 is 2,179kg lighter empty. The Equi-Trek Sonic 3,500kg is rated 3 tonnes heavier gross. The Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox; the Ifor Williams P5 is a the smallest unbraked domestic trailer Ifor Williams makes.
Which is lighter, the Equi-Trek Sonic 3,500kg or the Ifor Williams P5?
The Ifor Williams P5. It is 2,179kg lighter empty than the Equi-Trek Sonic 3,500kg.
Can I tow the Equi-Trek Sonic 3,500kg 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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