David Brown 990 Implematic vs J.I. Case 511-B

8 material differences · fewer than 12

Tractor one

David Brown 990 Implematic

1961–1965

No measured PTO figure

Tractor two

J.I. Case 511-B

1958–1960

No measured PTO figure

Which should you choose?

We will not advise between these two machines, because they were not built in overlapping years (1961–1965; 1958–1960). 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

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

David Brown 990 Implematic and J.I. Case 511-B, field by field
Field990 Implematic511-BGap
Engine
Engine power, claimed claimed52.0 hp44.4 hp+17% 990 Implematic
Engine declaredDAVID BROWN AD 4/47 ACASE 164differs
Displacement declared3.04 L2.70 L+13% 990 Implematic
Maximum torque declared141 lb·ft · 191 N·m
Transmission
Top speed declared13.7 mph · 22 km/h12.4–18.6 mph · 20–30 km/hdiffers
Clutch declaredpedal-operated CASE single-plate clutch
Hydraulics & hitch
Pump flow declared6.0 gpm · 22.7 L/min3.0 gpm · 11.4 L/min+99% 990 Implematic
Three-point lift at ends declared1,819 lb · 825 kg
Rear PTO speeds declared540 rpm540 rpm
Weight & dimensions
Unladen weight declared4,771 lb · 2,164 kg4,720 lb · 2,141 kg
Wheelbase declared76.7–78.7 in · 1,948–1,999 mm87.0 in · 2,210 mmdiffers
Length declared118.0–121.0 in · 2,997–3,073 mm138.0 in · 3,505 mmdiffers
Width declared64.0 in · 1,626 mm80.7 in · 2,051 mm+26% 511-B
Height declared56.0 in · 1,422 mm65.5 in · 1,664 mm+17% 511-B
Ground clearance declared20.0 in · 508 mm
Turning radius, braked declared10.5 ft · 3.20 m
Fuel tank declared55.2 qt · 52.2 L55.2 qt · 52.2 L

David Brown 990 Implematic sources

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

J.I. Case 511-B sources

Source
  • Source: Traktorenlexikon, “Case 511-B”