Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams BV106
The Ifor Williams BV106 is 1.6 tonnes lighter empty.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 1.6 tonnes more empty.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams BV106 | |
|---|---|---|
| Gross weight | 3500kg | 3500kg |
| Unladen weight | 2500kg | 900kg (6' H/R); 935kg (7' H/R) |
| Overall length | - | 4.70m |
| Internal load length | - | 3.00m |
| Internal width | - | 1.73m |
| Payload | - | 2600kg (6' H/R); 2565kg (7' H/R) |
| Tyres | - | 155/70R12C |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams BV106. 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 BV106 if...
- you want one that is 1.6 tonnes lighter empty
The BV106 is an enclosed, lockable box trailer aimed at trades and small businesses that need to keep tools, stock or equipment secure and dry between jobs. The taller 7' high-roof version suits bulkier or taller items at the cost of a little extra unladen weight.
Full BV106 specifications →Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams BV106?
The Ifor Williams BV106 is 1.6 tonnes lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams BV106 is a a twin-axle enclosed box van trailer, available in 6' and 7' high-roof versions..
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams BV106?
The Ifor Williams BV106. It is 1.6 tonnes 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 BV106 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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