Massey Harris 20-40
Series: SAWYER-MASSEY
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Massey Harris Sawyer-Massey – five Canadian heavy tractors from the 10-20 to the 25-45 from Hamilton, Ontario, four-cylinder engines of 4,417 to 16,088 cm³, 7.4 to 18.6 kW, 600 to 680 rpm
Sawyer-Massey was a Canadian implement works from Hamilton, Ontario, counted among the predecessor brands around Massey-Harris, which in the 1910s and 1920s built large, slow-running tractors with kerosene or petrol engines. Type designations such as 10-20, 20-40 and 25-45 follow the drawbar/belt horsepower rating common at the time: the first figure names the drawbar output, the second the belt-pulley output.
Read on 3 more paragraphs
The register lists here five versions with 7.4 to 18.6 kW, or 10.1 to 25.3 hp, from four-cylinder engines of 4,417 to 16,088 cm³ displacement, unladen weights from 2,359 to 7,983 kg, lengths from 3,378 to 4,826 mm, widths from 1,549 to 2,743 mm and speeds from 600 to 680 rpm.
In the early days of the tractor industry, such makers stood alongside the big US brands such as International Harvester and Case for the transition from steam to internal-combustion traction; the heavy, low-revving engines were designed to drive threshing machines and other stationary equipment via the belt pulley.
Surviving examples are museum and collector's pieces; the condition of cylinder bores and cooling, the tightness of the kerosene or petrol carburettors and the completeness of the belt pulley and drawbar gear matter, since spare parts can be sourced almost exclusively through new-made parts from specialists in historic farm machinery.
Sources: SpecCodex register, model data: Massey Harris Sawyer-Massey
Technical data
Engine
| Fuel | Kerosin/Benzincorrect |
|---|---|
| Power | 20.3 hp (14.9 kW)correct |
| Rated speed | 680 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 11,403 cm³correct |
| Bore | 142.88 mmcorrect |
| Stroke | 177.8 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 4,394 mmcorrect |
|---|---|
| Width | 2,075 mmcorrect |
| Unladen weight | 5,352 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 2 V/2 Rcorrect |
| Forward gears | 2correct |
| Reverse gears | 2correct |
| Front tyres | 965 x 203correct |
| Rear tyres | 1.575 x 508correct |
| Top speed | 5 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 2.8 kW/t (15 kW / 5.4 t)
Power class: Compact (< 40 hp)
Stronger than 7% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Massey Harris 20-40 have?
The Massey Harris 20-40 delivers 20.3 hp.
How much does the Massey Harris 20-40 weigh?
The unladen weight is 5,352 kg.
What engine does the Massey Harris 20-40 have?
4 cylinders, 11,403 cm³ displacement, Kerosin/Benzin.
How fast does the Massey Harris 20-40 go?
Top speed is 5 km/h.
What are the dimensions of the Massey Harris 20-40?
4,394 mm × 2,075 mm.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 21 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
