Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams BV126
The Ifor Williams BV126 is 1,520kg lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 1,520kg more empty.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams BV126 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2500kg | 980kg |
| Payload | - | 2520kg |
| Internal length | - | 3.60m |
| Internal width | - | 1.73m |
| Axles | - | Twin (dual) |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams BV126. 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...
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 BV126 if...
- you want one that is 1,520kg lighter empty
Aimed at businesses moving bulkier equipment or several machines that need to travel enclosed and secure, where the BV105 is too narrow or too light. Its 3500kg rating means a car-derived van or 4x4 with a suitable tow rating can still pull it.
Listed by
- 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 BV126?
The Ifor Williams BV126 is 1,520kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams BV126 is a a wider, higher-capacity enclosed box van trailer.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams BV126?
The Ifor Williams BV126. It is 1,520kg 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 BV126 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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