Compare/John Deere 140 vs John Deere 312

John Deere 140 vs John Deere 312

Verdict: John Deere 140 vs John Deere 312

The John Deere 140 and the John Deere 312 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. John Deere 312 is the lighter machine (344 kg vs 730 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 312 is the newer design (1977 vs 1968). 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

John Deere

Fit score

Best match

Clear

John Deere

Fit score

Best match

Clear

Rated power

12 hp

Confidence

98%

Guide price

—

Overview

Manufacturer

John DeereReference

The 14-horsepower K321 engine was first used in 1969 models, serial number 10,001.Reference

air-cooled horizontal-shaftReference

Original price

$1,745 (1974 H3 )Reference

—

Brakes

drum (1971 on)Reference

—

Variants

140H3

three hydraulic remotesReference

—

Engine

Fuel tank

6.6 LReference

—

Displacement

31.27 ciReference

29.1 ciReference

Bore/Stroke

89 x 83 mmReference

86 x 83 mmReference

Power (gross)

8.9 kWReference

Air cleaner

dryReference

Rated RPM

3600Reference

—

Idle RPM

1500-3800Reference

—

Starter

electricReference

—

Starter volts

12Reference

Sparkplug gap

0.635 mmReference

—

Point gap

0.508 mmReference

—

Intake valve clearance

0.254 mmReference

—

Exhaust valve clearance

0.508 mmReference

—

Oil capacity

4.7 LReference

—

Oil change

500 hReference

—

Power

10.4 kWReference

—

Transmission

ClutchReference

ThrottleReference

Forward/ReverseReference

ThrottleReference

BrakeReference

Brakes (not shown)Reference

Parking brakeReference

—

Transmission

Sundstrand 15Reference

Type

shaft-driven hydrostaticReference

Gears

infinite forward and reverseReference

Oil type

Deere 303Reference

JD All-Weather Hydrostatic FluidReference

PTO & Hydraulics

Rear Type

0Reference

—

Rear PTO

liveReference

—

Front PTO

independentReference

—

Clutch

electricReference

—

Dimensions

Wheelbase

116 cmReference

Weight

349 kgReference

344 kgReference

Front tire

16x6.50-8Reference

Rear tire

23x8.50-12Reference

Ag front

4.80/4.00-8Reference

—

Ag rear

23x8.50-12Reference

—

Lawn/turf front

16x6.50-8Reference

Lawn/turf rear

23x8.50-12Reference

Length

171 cmReference

175 cmReference

Width

96 cmReference

107 cmReference

Height (steering wheel)

109 cmReference

—

Front tread

79 cmReference

—

Rear tread

73/87 cmReference

—

Height

—

111 cmReference

John Deere 140 attachments

140 Serial Number Location

140 Serial Numbers

1968

1001Reference

—

1969

10001Reference

—

1970

22401Reference

—

1971

30001Reference

—

1972

38001Reference

—

1973

46501Reference

—

1974

56501Reference

—

Final

UnknownReference

—

Electrical

Ground

negativeReference

Battery volts

12Reference

Battery AH

40Reference

—

Attachment overview

John Deere 312 attachments

312 Serial Number Location

312 Serial Numbers

1977

—

C312F070001Reference

1978

—

C312G080001Reference

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.