Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams CT136
The Ifor Williams CT136 is 2.1 tonnes lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 2.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 2.1 tonnes more empty.
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 2.1 tonnes heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams CT136 | |
|---|---|---|
| Gross weight | 3500kg | 1,400kg single axle / 2,000kg twin axle / 2,600kg CT136HD |
| Unladen weight | 2500kg | 400kg single axle / 495kg twin axle |
| Bed | - | 4.00m x 1.84m |
Sources: Equi-Trek Sonic Five Seats 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 Five Seats 3,500kg if...
- you want one that is rated 2.1 tonnes 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 CT136 if...
- you want one that is 2.1 tonnes 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 Five Seats 3,500kg and the Ifor Williams CT136?
The Ifor Williams CT136 is 2.1 tonnes lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 2.1 tonnes heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams CT136 is a flatbed car transporter, single or twin axle.
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams CT136?
The Ifor Williams CT136. It is 2.1 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 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.
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