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David Brown 3800 Selectamatic vs David Brown Cropmaster Diesel

Verdict: David Brown 3800 Selectamatic vs David Brown Cropmaster Diesel

The David Brown 3800 Selectamatic and the David Brown Cropmaster Diesel are both tractors — here is how they stack up on the figures that matter. David Brown 3800 Selectamatic leads on rated power with 39 hp against 34 hp. David Brown Cropmaster Diesel is the lighter machine (1,338 kg vs 1,762 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. David Brown 3800 Selectamatic is the newer design (1968 vs 1949). In short: choose the David Brown 3800 Selectamatic for outright pulling power, or the David Brown Cropmaster Diesel 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 3800 Selectamatic Tractor
David Brown
62
Fit score
Best match
Clear
David Brown Cropmaster Diesel Tractor
David Brown
62
Fit score
Best match
Clear
Rated power
39 hp
34 hp
Confidence
40%
40%
Guide price
Overview
Manufacturer
David BrownReference
David BrownReference
Gear 1 used for pull test.Reference
Three gears (1-3) plus reverse (R) in two ranges (low/high).Reference
Original price
$4,000 (1971)Reference
Final drives
spur gearReference
Differential lock
rear diff lock standardReference
Steering
power-assist optionalReference
manualReference
Engine
Drawbar (tested)
24.0 kWReference
Displacement
2.4 LReference
2.5 LReference
Bore/Stroke
100 x 102 mmReference
89 x 102 mmReference
Air cleaner
oil bathReference
Compression
6.75:1Reference
15.9:1Reference
Rated RPM
2200Reference
1800Reference
Operating RPM
700-2200Reference
Torque
155.9 NmReference
Torque RPM
1400Reference
Starter volts
12Reference
Oil capacity
22.7 LReference
Coolant capacity
8.5 LReference
Power at rated engine speed
29.2 kWReference
Max power
24.0 kWReference
Engine
25.4 kWReference
Power
25.4 kWReference
Idle RPM
700-1800Reference
Transmission
Gears
12 forward and 4 reverseReference
6 forward and 2 reverseReference
Clutch
dry discReference
dry discReference
PTO & Hydraulics
PTO (claimed)
29.1 kWReference
PTO (tested)
29.2 kWReference
Hydraulic system
22.7 LReference
Type
gearReference
gearReference
Capacity
22.7 LReference
Pressure
137.9 barReference
Pump flow
27.6 lpmReference
Rear Type
IReference
IReference
Control
position and draft controlReference
Rear lift (at ends)
884 kgReference
Rear PTO
liveReference
Rear PTO Type
540/1000Reference
Power at rated PTO speed
27.8 kWReference
Capacities
Fuel
36.0 LReference
Dimensions
Wheelbase
193 cmReference
181 cmReference
Weight
1762 kgReference
1338 kgReference
Front tire
6.00-16Reference
6.00-19Reference
Rear tire
13.6/12-28Reference
9.00-28Reference
Ag front
14.9/13-28Reference
26x5 steelReference
Ag rear
13.6/12-28Reference
42x10 steelReference
Length
293 cmReference
283 cmReference
Width
163 cmReference
153 cmReference
Height (hood)
130 cmReference
Operating weight
1762 kgReference
Ballasted weight
2646 kgReference
Clearance (front axle)
44 cmReference
Clearance (drawbar)
29 cmReference
Front tread
121 to 182 cmReference
125 to 157 cmReference
Rear tread
152 to 203 cmReference
121 to 171 cmReference
Height
140 cmReference
Ground clearance
40 cmReference
Test results
Fuel use
12.9 l/hourReference
Max pull
2004 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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