11 material differences · fewer than 12
Tractor oneUTB U-650/651 M1973–1990No measured PTO figureTractor twoZETOR 6911/69451977–1980No measured PTO figure
Which should you choose?
Read our verdict on the U-650/651 M and the 6911/6945 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
11 material differences · 4 fields identical or within 5%, which is not counted as material
| Field | U-650/651 M | 6911/6945 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 64.1 hp | 64.1 hp | — |
| Engine declared | UTB D-110 | ZBROJORKA Z-6901 | differs |
| Displacement declared | 4.76 L | 3.59 L | +33% U-650/651 M |
| Maximum torque declared | 213 lb·ft · 289 N·m | 146 lb·ft · 198 N·m | +46% U-650/651 M |
| Transmission | |||
| Top speed declared | 16.8 mph · 27 km/h | 15.5 mph · 25 km/h | +8% U-650/651 M |
| Clutch declared | — | Dry double clutch | — |
| Hydraulics & hitch | |||
| Pump flow declared | 10.6 gpm · 40.0 L/min | 6.4 gpm · 24.3 L/min | +65% U-650/651 M |
| Pressure declared | 1,856 psi · 128 bar | 3,336 psi · 230 bar | +80% 6911/6945 |
| Rear PTO speeds declared | 540 rpm | 540/1000 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 7,452 lb · 3,380 kg | 6,327 lb · 2,870 kg | +18% U-650/651 M |
| Wheelbase declared | 95.7 in · 2,431 mm | 88.5 in · 2,247 mm | +8% U-650/651 M |
| Length declared | 156.3 in · 3,970 mm | 143.9 in · 3,655 mm | +9% U-650/651 M |
| Width declared | 73.2 in · 1,859 mm | 72.4 in · 1,840 mm | — |
| Ground clearance declared | 18.9 in · 480 mm | 18.9 in · 480 mm | — |
| Turning radius, braked declared | 11.9 ft · 3.64 m | 11.8 ft · 3.59 m | — |
| Fuel tank declared | 103.6 qt · 98.0 L | 80.3 qt · 76.0 L | +29% U-650/651 M |
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.
UTB U-650/651 M sources
- Source: Traktorenlexikon, “UTB U 650/651 M”
ZETOR 6911/6945 sources
- Source: Traktorenlexikon, “Zetor 6911”