Compare/Ford 6640 vs Ford 7810S

Ford 6640 vs Ford 7810S

Verdict: Ford 6640 vs Ford 7810S

The Ford 6640 and the Ford 7810S are both tractors — here is how they stack up on the figures that matter. Ford 6640 leads on rated power with 91 hp against 90 hp. Ford 6640 is the lighter machine (7,099 kg vs 7,721 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Ford 6640 holds more fuel (94.6 L vs 81.4 L) for longer stints between fills. Ford 7810S is the newer design (1994 vs 1991). In short: choose the Ford 6640 for outright pulling power, or the Ford 7810S if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

Ford

Fit score

Best match

Clear

Ford

Fit score

Best match

Clear

Rated power

91 hp

90 hp

Confidence

40%

Guide price

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Overview

Manufacturer

FordReference

Four power shift gears arranged in two synchronized ratio groups (1-4 and 5-8). Two synchronized ranges (low/high) and right-hand shuttle. Clutch must be used to shift range or move between the lower (1-4) and higher (5-8) gear ratio groups. Push-button power shifting between the four gears in a ratio group. Push-button de-clutching on the shuttle lever allow shifting without the foot clutch. The 16 power shift was standard on the 6640 SLE.Reference

Four gears, plus reverse, in two ranges. Tractor must be stopped, and clutch used, before shifting gear or range.Reference

Drive

4x4 MFWD 4WD (optional)Reference

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Final drives

inboard planetaryReference

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Differential lock

electro-hydraulic (SL/SLE)Reference

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Brakes

hydraulic wet disc (SL/SLE)Reference

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Original price

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$33,000 (1998)Reference

Steering

—

hydrostatic powerReference

Variants

6640S

8-speed economyReference

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6640SL

12-speedReference

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6640SLE

16-speed premiumReference

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Engine

Fuel tank

177.5 LReference

50.0 LReference

Engine (gross)

67.6 kWReference

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Engine (net)

63.4 kWReference

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Drawbar (tested)

50.1 kWReference

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Displacement

5.0 LReference

6.6 LReference

Bore/Stroke

112 x 127 mmReference

112 x 112 mmReference

Power (net)

63.4 kWReference

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Power (gross)

67.6 kWReference

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Air cleaner

dual paper elementsReference

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Compression

17.5:1Reference

Rated RPM

2200Reference

2100Reference

Idle RPM

725-2375Reference

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Torque

457.0 NmReference

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Torque RPM

1200Reference

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Firing order

1-3-4-2Reference

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Starter volts

12Reference

Coolant capacity

16.0 LReference

16.1 LReference

Intake valve clearance

0.406 mmReference

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Exhaust valve clearance

0.483 mmReference

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Oil capacity

60.6 LReference

20.8 LReference

Max power

50.1 kWReference

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Power at rated engine speed

57.2 kWReference

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Engine

—

74.6 kWReference

Power

—

74.6 kWReference

Transmission

ElectroShift/Pulse CommandReference

Dual PowerReference

Gears

16 forward and reverseReference

16 forward and 4 reverseReference

Clutch

wet discReference

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PTO & Hydraulics

PTO (claimed)

56.7 kWReference

67.1 kWReference

PTO (tested)

57.5 kWReference

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Type

four-speed power shiftReference

two-speed power shiftReference

Valves

1 to 4Reference

2Reference

Pump flow

79.5 lpmReference

36.7 lpmReference

Steering press.

144.8 barReference

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Rear Type

IIReference

Control

Position control and top-link draft sensing. Electronic lower-link sensing optional on 6640 SLE.Reference

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Rear lift (at 24"/610mm)

2977 kgReference

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Rear PTO

independentReference

Rear PTO Type

540/1000Reference

540/100Reference

Power at rated PTO speed

56.4 kWReference

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Pressure

—

172.4 barReference

Rear lift

—

1832 kgReference

Dimensions

Wheelbase

236 cmReference

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Weight

7099 to 9121 poundsReference

7721 to 8361 poundsReference

Front tire

7.50-16Reference

10.00-16Reference

Rear tire

16.9-30Reference

18.4-34Reference

Ag front

7.50-16Reference

10.00-16Reference

Ag rear

16.9-30Reference

18.4-34Reference

Length

411 cmReference

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2WD Width

195 cmReference

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4WD Width

203 cmReference

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2WD Clearance (front axle)

55 cmReference

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4WD Clearance (front axle)

50 cmReference

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2WD ROPS Shipping

3220 kgReference

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4WD ROPS Shipping

3670 kgReference

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2WD Cab Shipping

3687 kgReference

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4WD Cab Shipping

4137 kgReference

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Operating

3690 kgReference

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Ballasted

4702 kgReference

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2WD Wheelbase

—

248 cmReference

4WD Wheelbase

—

251 cmReference

2WD Length

—

394 cmReference

4WD Length

—

415 cmReference

Height (ROPS)

—

243 cmReference

2WD Weight

—

3502 kgReference

4WD Weight

—

3792 kgReference

2WD Ground clearance

—

46 cmReference

4WD Ground clearance

—

45 cmReference

Ford 6640 attachments

6640 Serial Numbers

1991

BC68791Reference

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1992

BD02865Reference

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1993

BD35935Reference

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1994

BD65544Reference

ZX200000Reference

1995

BD98440Reference

200000MReference

1996

021630BReference

200642MReference

1997

056502BReference

200933MReference

1998

083503BReference

201465MReference

Location:

Data plate inside hood.Reference

Right-front upper portion of transmissionReference

Electrical

Ground

negativeReference

Charging system

alternatorReference

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ROPS Charging amps

55Reference

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Cab Charging amps

100Reference

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ROPS Batteries

1Reference

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Cab Batteries

2Reference

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Battery CCA

800Reference

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Battery volts

12Reference

Attachment overview

Ford 6640 Height

Hood

170 cmReference

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Cab

271 cmReference

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Exhaust

284 cmReference

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Test results

Fuel use

17.0 l/hourReference

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Max pull

4768 kgReference

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Speeds

7810S Serial Numbers

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.