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David Brown 50D vs David Brown 990 Implematic

Verdict: David Brown 50D vs David Brown 990 Implematic

The David Brown 50D and the David Brown 990 Implematic are both tractors — here is how they stack up on the figures that matter. David Brown 990 Implematic leads on rated power with 52 hp against 50 hp. David Brown 50D is the lighter machine (2,780 kg vs 4,272 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. David Brown 50D holds more fuel (54.9 L vs 52.0 L) for longer stints between fills. David Brown 990 Implematic is the newer design (1961 vs 1953). In short: choose the David Brown 990 Implematic for outright pulling power, or the David Brown 50D if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Fit & specs
David Brown 50D Tractor
David Brown
62
Fit score
Best match
Clear
David Brown 990 Implematic Tractor
David Brown
62
Fit score
Best match
Clear
Rated power
50 hp
52 hp
Confidence
40%
40%
Guide price
Overview
Manufacturer
David BrownReference
David BrownReference
Steering
manualReference
hydrostatic power (optional)Reference
Differential lock
mechanical rearReference
Engine
With 14x30 rear tres,Reference
Twelve-speed transmission introduced in 1963.Reference
Fuel tank
54.9 LReference
52.0 LReference
Engine
37.3 kWReference
38.8 kWReference
Displacement
4.1 LReference
3.0 LReference
Bore/Stroke
92 x 102 mmReference
92 x 114 mmReference
Power
37.3 kWReference
38.8 kWReference
Compression
16:1Reference
17:1Reference
Rated RPM
1800Reference
2200Reference
Idle RPM
700-1800Reference
Oil capacity
22.7 LReference
7.4 LReference
Coolant capacity
18.9 LReference
13.6 LReference
Drawbar (claimed)
32.1 kWReference
Drawbar (tested)
32.4 kWReference
Air cleaner
oil bathReference
Operating RPM
700-2200Reference
Starter volts
12Reference
Power at rated engine speed
38.5 kWReference
Max power
32.4 kWReference
Transmission
Type
gearReference
partially synchronizedReference
Gears
6 forward and 2 reverseReference
12 forward and 4 reverseReference
Clutch
10-inch dry discReference
279mm dry discReference
PTO & Hydraulics
Rear PTO Type
540Reference
540/1000 (1.375)Reference
PTO (claimed)
35.8 kWReference
PTO (tested)
38.5 kWReference
Pressure
137.9 barReference
Total flow
28.0 lpmReference
Rear Type
II/IReference
Rear PTO
live (optional)Reference
Engine RPM
1000@2000Reference
Power at rated PTO speed
36.2 kWReference
Dimensions
Wheelbase
207 cmReference
194 cmReference
Weight
2780 kgReference
4272 to 4312 poundsReference
Front tire
7.50-18Reference
6.00-16Reference
Rear tire
14-30Reference
11-32Reference
Ag front
7.50-18Reference
Ag rear
14-30Reference
Length
342 cmReference
299 cmReference
Width
187 cmReference
170 cmReference
Height (hood)
165 cmReference
142 cmReference
Ground clearance
33 cmReference
Standard tires (ag)
Front: 6.00-16. Rear: 11-32Reference
Clearance (front axle)
50 cmReference
Front tread
132/142/152/162/172/182/193 cmReference
Rear tread
132/142/152/162/172/182/193 cmReference
Operating
1955 kgReference
Ballasted
2667 kgReference
50D Serial Numbers
1953
VAD/6 10001Reference
1954
VAD/6 ?????Reference
1955
VAD/6 10400Reference
1956
VAD/6 ?????Reference
1957
VAD/6 ?????Reference
1958
VAD/6 ?????Reference
Final
VAD/6 11260Reference
Speeds
990 Serial Numbers
1961
440001Reference
1962
441323Reference
1963
450376Reference
1964
460376Reference
1965
472273Reference
1966
483768Reference
1967
496283Reference
1968
504690Reference
1969
808150Reference
1970
818301Reference
1971
826009Reference
1972
850600Reference
1973
854403Reference
1974
859367Reference
1975
863900Reference
1976
11070001Reference
1977
11080236Reference
1978
11089141Reference
1979
11096828Reference
1980
11104577Reference
Location:
Frame, right sideReference
Electrical
Charging system
generatorReference
Batteries
2Reference
Battery volts
6Reference
Test results
Fuel use
11.4 l/hourReference
Max pull
2739 kgReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.

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