Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams P6
The Equi-Trek Sonic Five Seats 3,500kg is rated 2.5 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 2.5 tonnes heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams P6 | |
|---|---|---|
| Gross weight | 3500kg | 1000kg |
| Unladen weight | 2500kg | - |
| Axles | - | Single |
| Brakes | - | Braked |
| Size | - | 6ft x 4ft |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams P6. 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 2.5 tonnes 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 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 Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams P6?
The Equi-Trek Sonic Five Seats 3,500kg is rated 2.5 tonnes heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams P6 is a small general purpose trailer, 6ft x 4ft.
Can I tow the Equi-Trek Sonic Five Seats 3,500kg 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.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.