Head to head
Caterpillar D3 vs Iseki TF321F
The Caterpillar D3 has 62kW more power.
Last reviewed 13 September 2026
Key differences
- Engine power: the Caterpillar D3 has 62kW more power.
Specifications side by side
| Caterpillar D3 | Iseki TF321F | |
|---|---|---|
| Engine power | 77.6kW (104hp) | 21HP |
| Operating weight | 9362kg (20,640lb) | - |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Engine | Cat C3.6 | - |
| Drive | - | 4WD |
Sources: Caterpillar D3, Iseki TF321F. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D3 if...
- you want one that has 62kW more power
Caterpillar's smallest crawler dozer, used for fine grading, landscaping and confined-site work where a full-size dozer won't fit. Common in UK plant hire fleets alongside mini excavators.
Listed by
- B & T Plant Hire - Gravesend
- B & T Plant Hire Ltd - Morden
Buy or hire the TF321F if...
A small 4WD compact tractor aimed at smallholdings, paddocks and estate grounds work rather than full-scale farming. Its low power puts it alongside garden and topper attachments, not ploughing or heavy haulage.
Listed by
- Baz plant Sales agricultural plant and machinery dealer - Chesterfield
Common questions
What is the difference between the Caterpillar D3 and the Iseki TF321F?
The Caterpillar D3 has 62kW more power. The Caterpillar D3 is a small crawler dozer; the Iseki TF321F is a 4WD compact tractor.
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