7 material differences · fewer than 12
Tractor oneJohn Deere Model A1934–1952No measured PTO figureTractor twoZETOR Z-251946–1951No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their power is identical, with the same weight or the same engine, which usually means one machine sold under two names; any difference below comes from how each source describes it. The figures below are side by side so you can judge them yourself; each says whether it was measured, claimed or declared by its source.
Field by field
7 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | Model A | Z-25 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 24.7 hp | 24.7 hp | — |
| Transmission | |||
| Top speed declared | 6.2–12.4 mph · 10–20 km/h | 12.4 mph · 20 km/h | differs |
| Clutch declared | — | Pedal-operated dry single-plate clutch | — |
| Hydraulics & hitch | |||
| Rear PTO speeds declared | 546 rpm | 533 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 4,059–5,986 lb · 1,841–2,715 kg | 4,026 lb · 1,826 kg | differs |
| Wheelbase declared | 90.0 in · 2,286 mm | 74.8 in · 1,900 mm | +20% Model A |
| Length declared | 124.0–134.0 in · 3,150–3,404 mm | 126.0 in · 3,200 mm | differs |
| Width declared | 82.7–86.2 in · 2,100–2,190 mm | 70.9 in · 1,800 mm | differs |
| Ground clearance declared | 26.0 in · 660 mm | 12.6 in · 320 mm | +106% Model A |
| Fuel tank declared | — | 47.6 qt · 45.0 L | — |
Height is not in this table. It is not one measurement: the sources measure it to different points — over the cab on some machines, over the steering wheel or the exhaust on others — and the same tractor measured two ways can differ by most of a metre. It appears here only when both machines' figures carry the point they were measured to and it is the same point, which is not the case for these two. Each machine's own page prints its height as its source gives it.
John Deere Model A sources
- Source: Traktorenlexikon, “John Deere Modell A”
ZETOR Z-25 sources
- Source: Traktorenlexikon, “Zetor 25”