Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams P6e
The Ifor Williams P6e is 2,328kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 2,750kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 2,328kg more empty.
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 2,750kg heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams P6e | |
|---|---|---|
| Gross weight | 3500kg | 750kg |
| Unladen weight | 2500kg | 172kg |
| Payload | - | 578kg |
| Internal bed | - | 1.98m x 1.21m |
| Brakes | - | Unbraked |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams P6e. 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 2,750kg 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 P6e if...
- you want one that is 2,328kg lighter empty
A step up from the P5 for domestic and light trade users who need a slightly bigger bed while staying under the 750kg limit that avoids the need for brakes.
Full P6e specifications →Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams P6e?
The Ifor Williams P6e is 2,328kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 2,750kg heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams P6e is a a small unbraked general-purpose trailer.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams P6e?
The Ifor Williams P6e. It is 2,328kg 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 P6e 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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