7 material differences · fewer than 12
Tractor oneALLIS-CHALMERS Modell-WF1937–1951No measured PTO figureTractor twoLanz D 7521/31935–1936No measured PTO figure
Which should you choose?
Read our verdict on the Modell-WF and the D 7521/3 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
7 material differences · 2 fields identical or within 5%, which is not counted as material
| Field | Modell-WF | D 7521/3 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 24 hp | 24.5 hp | — |
| Engine declared | ALLIS-CHALMERS W-110 | — | — |
| Displacement declared | 3.30 L | — | — |
| Transmission | |||
| Top speed declared | 9.9 mph · 16 km/h | 9.9 mph · 15.9 km/h | — |
| Clutch declared | Foot-operated spring-loaded dry Rockford single-plate clutch | Pedal operated three-shoe clutch with clutch brake | differs |
| Hydraulics & hitch | |||
| Rear PTO speeds declared | 535 rpm | 760 | differs |
| Weight & dimensions | |||
| Unladen weight declared | 3,490 lb · 1,583 kg | 6,724 lb · 3,050 kg | +93% D 7521/3 |
| Wheelbase declared | 70.0 in · 1,778 mm | 64.8 in · 1,645 mm | +8% Modell-WF |
| Length declared | 122.0 in · 3,099 mm | 115.6 in · 2,935 mm | +6% Modell-WF |
| Width declared | 57.5 in · 1,461 mm | 66.9 in · 1,700 mm | +16% D 7521/3 |
| Ground clearance declared | — | 9.6 in · 245 mm | — |
| Fuel tank declared | 59.9 qt · 56.7 L | 52.8 qt · 50 L | +13% Modell-WF |
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.
ALLIS-CHALMERS Modell-WF sources
- Source: Traktorenlexikon, “Allis-Chalmers WF”
- Source: Traktorenlexikon, “Allis-Chalmers WC”
Lanz D 7521/3 sources
- Source: Traktorenlexikon, “Lanz D 7521/3”