Head to head
Ifor Williams GD85 vs Ifor Williams TT3621
The Ifor Williams GD85 is 595kg lighter empty. The Ifor Williams TT3621 is rated 2.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams TT3621 weighs 595kg more empty.
- Gross weight: the Ifor Williams TT3621 is rated 2.1 tonnes heavier gross.
Specifications side by side
| Ifor Williams GD85 | Ifor Williams TT3621 | |
|---|---|---|
| Gross weight | 1,400kg single axle / 2,700kg twin axle | 3500kg |
| Unladen weight | 395kg single axle / 485kg twin axle | 990kg (195/60R12C tyres) or 1000kg (185/70R13C tyres) |
| Internal bed | 2.5m x 1.58m (8ft 2in x 5ft 2in) | - |
| Brakes | Braked, auto-reverse over-run | - |
| Payload | - | 2510kg (195/60R12C) or 2500kg (185/70R13C) |
| Internal length | - | 3.62m / 11'9" |
| Internal width | - | 1.95m / 6'5" |
Sources: Ifor Williams GD85, Ifor Williams TT3621. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GD85 if...
- you want one that is 595kg lighter empty
The entry point of the Ifor Williams general duty range and one of the most common working trailers in Britain. Smallholders, gardeners and tradespeople buy it for everyday hauling without needing a heavy tow vehicle, and the twin-axle version roughly doubles the payload for a modest gain in unladen weight.
Full GD85 specifications →Buy or hire the TT3621 if...
- you want one that is rated 2.1 tonnes heavier gross
The largest Ifor Williams tipper. A 3.6m by 1.95m body is chosen for bulky, lighter loads - green waste, clearance and bark - where volume runs out before weight does, and it is a staple of plant and tool hire fleets. Formerly sold as the TT126.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Ifor Williams GD85 and the Ifor Williams TT3621?
The Ifor Williams GD85 is 595kg lighter empty. The Ifor Williams TT3621 is rated 2.1 tonnes heavier gross. The Ifor Williams GD85 is a general duty box trailer, single or twin axle; the Ifor Williams TT3621 is a twin axle tipping trailer, 12ft body, electric tipping.
Which is lighter, the Ifor Williams GD85 or the Ifor Williams TT3621?
The Ifor Williams GD85. It is 595kg lighter empty than the Ifor Williams TT3621.
Can I tow the Ifor Williams GD85 or the Ifor Williams TT3621 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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