Head to head
Equi-Trek Sonic Five Seats 3,500kg vs Ifor Williams CT136HD
The Ifor Williams CT136HD is 1,990kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 900kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Equi-Trek Sonic Five Seats 3,500kg weighs 1,990kg more empty.
- Gross weight: the Equi-Trek Sonic Five Seats 3,500kg is rated 900kg heavier gross.
Specifications side by side
| Equi-Trek Sonic Five Seats 3,500kg | Ifor Williams CT136HD | |
|---|---|---|
| Gross weight | 3500kg | 2,600kg |
| Unladen weight | 2500kg | 510kg |
| Internal length | - | 4.0m |
| Internal width | - | 1.84m |
Sources: Equi-Trek Sonic Five Seats 3,500kg, Ifor Williams CT136HD. 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 900kg 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 CT136HD if...
- you want one that is 1,990kg lighter empty
The CT136HD suits recovery operators, racers and dealers who need a tougher car transporter than the standard CT136, thanks to its heavy-duty beam axles and multi-leaf suspension. Its 4.0m bed and 2.6 tonne gross weight cover most road cars without the cost of a beavertail trailer.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Equi-Trek Sonic Five Seats 3,500kg and the Ifor Williams CT136HD?
The Ifor Williams CT136HD is 1,990kg lighter empty. The Equi-Trek Sonic Five Seats 3,500kg is rated 900kg heavier gross. The Equi-Trek Sonic Five Seats 3,500kg is a 5-seat version of the Sonic motorised horsebox; the Ifor Williams CT136HD is a ifor Williams' heavy-duty twin-axle car transporter trailer in the CT136 range, built for moving a single vehicle..
Which is lighter, the Equi-Trek Sonic Five Seats 3,500kg or the Ifor Williams CT136HD?
The Ifor Williams CT136HD. It is 1,990kg 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 CT136HD 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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