6 material differences · fewer than 12
Tractor oneJ.I. Case 6401960–1969No measured PTO figureTractor twoJohn Deere 2020 OU1967–1972No measured PTO figure
Which should you choose?
Read our verdict on the 640 and the 2020 OU → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
6 material differences · 4 fields identical or within 5%, which is not counted as material
| Field | 640 | 2020 OU | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 52.0 hp | 59.3 hp | +14% 2020 OU |
| Engine declared | — | John Deere M 5 BL 4 or 4202 DL-01 | — |
| Displacement declared | — | 3.32 L | — |
| Maximum torque declared | — | 141 lb·ft · 191 N·m | — |
| Transmission | |||
| Top speed declared | 12.4–21.7 mph · 20–35 km/h | 12.4–15.5 mph · 20–25 km/h | differs |
| Clutch declared | — | Pedal operated two stage and dry Fichtel & Sachs double clutch | — |
| Hydraulics & hitch | |||
| Hydraulic centre declared | — | Closed centre | — |
| Pump flow declared | 9.3 gpm · 35.2 L/min | 6.6 gpm · 24.8 L/min | +42% 640 |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,495 lb · 2,039 kg | 5,159 lb · 2,340 kg | +15% 2020 OU |
| Maximum permissible mass declared | — | 8,818 lb · 4,000 kg | — |
| Wheelbase declared | 79.3 in · 2,013 mm | 80.1 in · 2,035 mm | — |
| Length declared | 134.5 in · 3,416 mm | 140.6 in · 3,570 mm | — |
| Width declared | 80.7 in · 2,051 mm | 61.4–70.9 in · 1,560–1,800 mm | differs |
| Ground clearance declared | 20.9 in · 530 mm | 13.2 in · 336 mm | +58% 640 |
| Turning radius, braked declared | 9.8 ft · 3.00 m | 10.1 ft · 3.08 m | — |
| Fuel tank declared | 69.2 qt · 65.5 L | 78.0 qt · 73.8 L | +13% 2020 OU |
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.
J.I. Case 640 sources
Source
- Source: Traktorenlexikon, “Case 640”
John Deere 2020 OU sources
Source
- Source: Traktorenlexikon, “John Deere 2020 OU”