David Brown 990 Implematic vs Steyr 650 (a)

12 material differences

Tractor one

David Brown 990 Implematic

1961–1965

No measured PTO figure

Tractor two

Steyr 650 (a)

1971–1977

No measured PTO figure

Which should you choose?

We will not advise between these two machines, because the drive differs (2WD; 2WD / 4WD); they were not built in overlapping years (1961–1965; 1971–1977). 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

12 material differences · 3 fields identical or within 5%, which is not counted as material

David Brown 990 Implematic and Steyr 650 (a), field by field
Field990 Implematic650 (a)Gap
Engine
Engine power, claimed claimed52.0 hp49.3 hp+5% 990 Implematic
Engine declaredDAVID BROWN AD 4/47 ASteyr WD-408.81differs
Displacement declared3.04 L2.05 L+48% 990 Implematic
Maximum torque declared141 lb·ft · 191 N·m142 lb·ft · 192 N·m
Transmission
Top speed declared13.7 mph · 22 km/h18.6 mph · 30 km/h+36% 650 (a)
Clutch declaredPedal operated dry Fichtel & Sachs double clutch
Hydraulics & hitch
Pump flow declared6.0 gpm · 22.7 L/min9.0 gpm · 34.0 L/min+50% 650 (a)
Pressure declared2,489 psi · 172 bar
Three-point lift at ends declared1,819 lb · 825 kg5,291 lb · 2,400 kg+191% 650 (a)
Rear PTO speeds declared540 rpm540/1000 rpmdiffers
Weight & dimensions
Unladen weight declared4,771 lb · 2,164 kg4,806 lb · 2,180 kg
Maximum permissible mass declared8,818 lb · 4,000 kg
Wheelbase declared76.7–78.7 in · 1,948–1,999 mm83.7 in · 2,125 mmdiffers
Length declared118.0–121.0 in · 2,997–3,073 mm138.2 in · 3,510 mmdiffers
Width declared64.0 in · 1,626 mm66.1 in · 1,678 mm
Height declared56.0 in · 1,422 mm84.4 in · 2,145 mm+51% 650 (a)
Ground clearance declared20.0 in · 508 mm15.7 in · 400 mm+27% 990 Implematic
Turning radius, braked declared10.5 ft · 3.20 m11.3 ft · 3.43 m+7% 650 (a)
Fuel tank declared55.2 qt · 52.2 L87.7 qt · 83 L+59% 650 (a)

David Brown 990 Implematic sources

Source
  • Source: Traktorenlexikon, “David Brown 990 Implematic”

Steyr 650 (a) sources

Source
  • Source: Traktorenlexikon, “Steyr 650”