Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams P7e
The Ifor Williams P7e is 2,307kg 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 2,307kg 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 P7e | |
|---|---|---|
| Gross weight | 3500kg | 750kg |
| Unladen weight | 2500kg | 193kg |
| Payload | - | 557kg |
| Internal bed | - | 2.21m x 1.21m |
| Brakes | - | Unbraked |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams P7e. 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.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Three Counties - Hereford
Buy or hire the P7e if...
- you want one that is 2,307kg lighter empty
For buyers who find the P6e's bed a little short for longer items like ladders or fencing panels, on the same unbraked 750kg chassis.
Listed by
- Cobham Trailer Hire - Cobham, East Horsley
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams P7e?
The Ifor Williams P7e is 2,307kg 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 P7e is a a slightly longer unbraked general-purpose trailer.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams P7e?
The Ifor Williams P7e. It is 2,307kg 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 P7e 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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