Head to head
Equi-Trek Sonic 3,500kg vs Ifor Williams CT136
The Ifor Williams CT136 is 1,920kg lighter empty. The Equi-Trek Sonic 3,500kg is rated 2.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic 3,500kg weighs 1,920kg more empty.
- Gross weight: the Equi-Trek Sonic 3,500kg is rated 2.1 tonnes heavier gross.
Specifications side by side
| Equi-Trek Sonic 3,500kg | Ifor Williams CT136 | |
|---|---|---|
| Gross weight | 3500kg | 1,400kg single axle / 2,000kg twin axle / 2,600kg CT136HD |
| Unladen weight | 2320kg | 400kg single axle / 495kg twin axle |
| Bed | - | 4.00m x 1.84m |
Sources: Equi-Trek Sonic 3,500kg, Ifor Williams CT136. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Sonic 3,500kg if...
- you want one that is rated 2.1 tonnes heavier gross
A compact motorised horsebox pitched as easy to drive day to day, for owners of one or two horses who want a small horsebox rather than a trailer and tow car. It is one of Equi-Trek's lower-cost motorised models.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- Trek-Trailers Three Counties - Hereford
Buy or hire the CT136 if...
- you want one that is 1,920kg lighter empty
The accessible end of car transport, for towing a road car, a track-day car or a small classic. Motorsport and classic-car owners tend toward the twin-axle and HD versions for the higher gross weight and the tie-down provision.
Full CT136 specifications →Common questions
What is the difference between the Equi-Trek Sonic 3,500kg and the Ifor Williams CT136?
The Ifor Williams CT136 is 1,920kg lighter empty. The Equi-Trek Sonic 3,500kg is rated 2.1 tonnes heavier gross. The Equi-Trek Sonic 3,500kg is a compact 3.5 tonne motorised 2-horse horsebox; the Ifor Williams CT136 is a flatbed car transporter, single or twin axle.
Which is lighter, the Equi-Trek Sonic 3,500kg or the Ifor Williams CT136?
The Ifor Williams CT136. It is 1,920kg lighter empty than the Equi-Trek Sonic 3,500kg.
Can I tow the Equi-Trek Sonic 3,500kg or the Ifor Williams CT136 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.