Compare/David Brown 3800 Selectamatic vs David Brown 40TD

David Brown 3800 Selectamatic vs David Brown 40TD

Verdict: David Brown 3800 Selectamatic vs David Brown 40TD

The David Brown 3800 Selectamatic and the David Brown 40TD are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 39 hp. David Brown 3800 Selectamatic is the lighter machine (1,762 kg vs 8,050 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 1960). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

David Brown

Fit score

Best match

Clear

David Brown

Fit score

Best match

Clear

Rated power

39 hp

Confidence

40%

Guide price

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Overview

Manufacturer

David BrownReference

Gear 1 used for pull test.Reference

liquid-cooledReference

Original price

$4,000 (1971)Reference

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Final drives

spur gearReference

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Differential lock

rear diff lock standardReference

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Steering

power-assist optionalReference

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Drive

—

crawlerReference

Engine

Drawbar (tested)

24.0 kWReference

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Displacement

2.4 LReference

2.7 LReference

Bore/Stroke

100 x 102 mmReference

92 x 102 mmReference

Air cleaner

oil bathReference

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Compression

6.75:1Reference

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Rated RPM

2200Reference

Operating RPM

700-2200Reference

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Torque

155.9 NmReference

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Torque RPM

1400Reference

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Starter volts

12Reference

Oil capacity

22.7 LReference

54.0 LReference

Coolant capacity

8.5 LReference

15.9 LReference

Power at rated engine speed

29.2 kWReference

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Max power

24.0 kWReference

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Fuel tank

—

263.8 LReference

Drawbar (claimed)

—

24.6 kWReference

Starter

—

electricReference

Transmission

Gears

12 forward and 4 reverseReference

6 forward and 2 reverseReference

Clutch

dry discReference

305mm dry discReference

PTO & Hydraulics

PTO (claimed)

29.1 kWReference

PTO (tested)

29.2 kWReference

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Hydraulic system

22.7 LReference

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Type

gearReference

Capacity

22.7 LReference

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Pressure

137.9 barReference

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Pump flow

27.6 lpmReference

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Rear Type

IReference

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Control

position and draft controlReference

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Rear lift (at ends)

884 kgReference

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Rear PTO

liveReference

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Rear PTO Type

540/1000Reference

540 (1.375)Reference

Power at rated PTO speed

27.8 kWReference

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Engine RPM

—

2360@1800Reference

Capacities

Fuel

36.0 LReference

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Dimensions

Wheelbase

193 cmReference

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Weight

1762 kgReference

8050 to 8450 poundsReference

Front tire

6.00-16Reference

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Rear tire

13.6/12-28Reference

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Ag front

14.9/13-28Reference

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Ag rear

13.6/12-28Reference

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Length

293 cmReference

287 cmReference

Width

163 cmReference

40 cmReference

Height (hood)

130 cmReference

157 cmReference

Operating weight

1762 kgReference

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Ballasted weight

2646 kgReference

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Clearance (front axle)

44 cmReference

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Clearance (drawbar)

29 cmReference

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Front tread

121 to 182 cmReference

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Rear tread

152 to 203 cmReference

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48G Width

—

160 cmReference

56G Width

—

180 cmReference

Gauge

—

142 cmReference

48G Shipping

—

3651 kgReference

56G Shipping

—

3696 kgReference

48G Operating

—

3787 kgReference

56G Operating

—

3832 kgReference

Test results

Fuel use

12.9 l/hourReference

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Max pull

2004 kgReference

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David Brown 40TD Tracks

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.