6 material differences · fewer than 12
Tractor oneInternational Harvester 15-301921–1929No measured PTO figureTractor twoLanz D 85391934–1939No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their unladen weight differs by more than 25% (58%); they were not built in overlapping years (1921–1929; 1934–1939). 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
6 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | 15-30 | D 8539 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 29.6 hp | 29.5 hp | — |
| Engine declared | INTERNATIONAL HARVESTER 381 | — | — |
| Displacement declared | 6.26 L | — | — |
| Transmission | |||
| Top speed declared | 4.3 mph · 7.0 km/h | 13.4 mph · 21.5 km/h | +207% D 8539 |
| Clutch declared | Pedal operated multi-disc clutch | pedal-operated three-jaw clutch with clutch brake | differs |
| Hydraulics & hitch | |||
| Rear PTO speeds declared | 661 rpm | — | — |
| Weight & dimensions | |||
| Unladen weight declared | 5,800 lb · 2,631 kg | 9,149 lb · 4,150 kg | +58% D 8539 |
| Wheelbase declared | 85.0 in · 2,159 mm | 76.4–77.8 in · 1,940–1,975 mm | differs |
| Length declared | 137.0 in · 3,480 mm | 129.9 in · 3,300 mm | +5% 15-30 |
| Width declared | 65.0 in · 1,651 mm | 70.9 in · 1,800 mm | +9% D 8539 |
| Ground clearance declared | — | 9.4–10.6 in · 240–270 mm | — |
| Turning radius, braked declared | 8.2 ft · 2.51 m | — | — |
| Fuel tank declared | — | 95.1–100.4 qt · 90–95 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.
International Harvester 15-30 sources
- Source: Traktorenlexikon, “McCormick 15-30”
- Source: Traktorenlexikon, “IHC 15-30”
Lanz D 8539 sources
- Source: Traktorenlexikon, “Lanz D 8539”