Compare/David Brown 4600 Selectamatic vs David Brown 780

David Brown 4600 Selectamatic vs David Brown 780

Verdict: David Brown 4600 Selectamatic vs David Brown 780

The David Brown 4600 Selectamatic and the David Brown 780 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 46 hp. David Brown 780 is the lighter machine (1,573 kg vs 1,950 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. David Brown 4600 Selectamatic is the newer design (1968 vs 1967). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

David Brown

Fit score

Best match

Clear

David Brown

Fit score

Best match

Clear

Rated power

46 hp

Confidence

40%

Guide price

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Overview

Manufacturer

David BrownReference

Gear 1 used for pull test.Reference

liquid-cooledReference

Original price

$4,600 (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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Total built

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8,986Reference

Engine

Drawbar (tested)

28.6 kWReference

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Displacement

2.7 LReference

Bore/Stroke

100 x 114 mmReference

Air cleaner

oil bathReference

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Compression

7.5:1Reference

17:1Reference

Rated RPM

2200Reference

Operating RPM

700-2200Reference

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Torque

189.8 NmReference

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Torque RPM

1400Reference

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Starter volts

12Reference

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Oil capacity

22.7 LReference

Coolant capacity

10.4 LReference

9.5 LReference

Power at rated engine speed

34.3 kWReference

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Max power

28.6 kWReference

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Fuel tank

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36.0 LReference

Engine (gross)

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34.3 kWReference

Drawbar (claimed)

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29.0 kWReference

Power (gross)

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34.3 kWReference

Idle RPM

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700-2200Reference

Firing order

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1-2-3Reference

Transmission

Gears

12 forward and 4 reverseReference

6 forward and 2 reverseReference

Clutch

dry discReference

Transmission

—

sliding gearReference

PTO & Hydraulics

PTO (claimed)

34.3 kWReference

32.0 kWReference

PTO (tested)

34.3 kWReference

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Hydraulic system

22.7 LReference

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Type

gearReference

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Capacity

22.7 LReference

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Pressure

137.9 barReference

Valves

0 to 2Reference

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Pump flow

27.6 lpmReference

28.0 lpmReference

Rear Type

II/IReference

IReference

Control

position and draft controlReference

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Rear lift (at ends)

1134 kgReference

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Rear PTO

liveReference

Rear PTO Type

540/1000Reference

Engine RPM

1000@2000Reference

Power at rated PTO speed

32.2 kWReference

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Oil type

—

SAE20W40Reference

Rear lift

—

725 kgReference

Capacities

Fuel

52.0 LReference

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Dimensions

Wheelbase

202 cmReference

192 cmReference

Weight

1950 kgReference

1573 kgReference

Front tire

6.00-16Reference

Rear tire

14.9/13-28Reference

12.4/11-28Reference

Ag front

7.50-16Reference

6.00-16Reference

Ag rear

14.9/13-28Reference

12.4/11-28Reference

Length

308 cmReference

283 cmReference

Width

173 cmReference

162 cmReference

Height (hood)

137 cmReference

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Operating weight

1950 kgReference

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Ballasted weight

3061 kgReference

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Clearance (front axle)

50 cmReference

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Clearance (drawbar)

36 cmReference

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Front tread

132 to 182 cmReference

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Rear tread

152 to 203 cmReference

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Height

—

209 cmReference

Ground clearance

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29 cmReference

4600 Serial Numbers

1969

900001Reference

602853Reference

1970

900312Reference

606109Reference

1971

900422Reference

609665Reference

Test results

Fuel use

14.0 l/hourReference

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Max pull

2458 kgReference

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780 Serial Numbers

1967

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600001Reference

1968

—

600879Reference

Location:

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Front-right side of chassis, just behind the radiatorReference

Electrical

Ground

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negativeReference

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.