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John Deere AR Unstyled vs John Deere M
Verdict: John Deere AR Unstyled vs John Deere M
The John Deere AR Unstyled and the John Deere M are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 18 hp. John Deere M is the lighter machine (1,179 kg vs 2,154 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere M is the newer design (1947 vs 1935). 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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Fit & specs
John Deere
71
Fit score
Best match
Clear
John Deere
71
Fit score
Best match
Clear
Rated power
18 hp
18 hp
Confidence
98%
98%
Guide price
—
—
Overview
Manufacturer
John DeereReference
John DeereReference
Gear 1 used for pull test.Reference
With 9-24 rear tires.Reference
AR Total built
17,394Reference
—
AO Total built
2,686Reference
—
Total built
—
45,799Reference
Variants
A
Row-cropReference
—
AR
Standard front axleReference
—
AO
OrchardReference
—
AOS
narrow orchardReference
—
AW
Adjustable wide-frontReference
—
AN
Single front wheelReference
—
AH
High-cropReference
—
M
—
utilityReference
MT
—
row-cropReference
MC
—
crawlerReference
MI
—
industrialReference
Engine
Drawbar (claimed)
13.4 kWReference
13.4 kWReference
Belt (claimed)
17.9 kWReference
14.9 kWReference
Plows
2Reference
—
Drawbar (tested)
19.8 kWReference
13.5 kWReference
Belt (tested)
22.6 kWReference
15.2 kWReference
Displacement
5.3 LReference
1.6 LReference
Bore/Stroke
140 x 171 mmReference
102 x 102 mmReference
Cooling system
thermo-siphonReference
—
Air cleaner
oil bathReference
—
Compression
4.45:1Reference
6:1Reference
Rated RPM
975Reference
1650Reference
Firing order
1-2Reference
1-2Reference
Oil capacity
10.4 LReference
4.7 LReference
Coolant capacity
30.3 LReference
13.2 LReference
Sparkplug gap
0.762 mmReference
0.635 mmReference
Belt power (max)
22.6 kWReference
15.2 kWReference
Max power
19.8 kWReference
13.5 kWReference
Fuel tank
—
37.9 LReference
Starter volts
—
6Reference
Point gap
—
0.559 mmReference
Intake valve clearance
—
0.305 mmReference
Exhaust valve clearance
—
0.305 mmReference
Transmission
Transmission
John DeereReference
—
Gears
4 forward and 1 reverseReference
4 forward and 1 reverseReference
Clutch
dry discReference
—
Capacities
Fuel
60.6 LReference
—
Aux. fuel
3.8 LReference
—
Diameter
32 cmReference
18 cmReference
Width
162 cmReference
129 cmReference
RPM
975Reference
1575Reference
Speed
996.70 meters/minReference
911.05 meters/minReference
PTO & Hydraulics
Hydraulic system
7.9 LReference
—
Type
unsynchronized gearReference
unsynchronized gearReference
Capacity
7.9 LReference
—
Valves
1Reference
—
Pump flow
33.7 lpmReference
—
Rear PTO
transmissionReference
transmissionReference
Rear PTO Type
540Reference
550Reference
Pressure
—
48.3 barReference
Total flow
—
16.1 lpmReference
Oil type
—
10WReference
Dimensions
Weight
2154 kgReference
1179 kgReference
Front tire
28x6Reference
4.00x15Reference
Rear tire
42.75x10Reference
8-24Reference
Ag front
6.00-16Reference
5.00x15Reference
Ag rear
12-26Reference
10-24Reference
Length
314 cmReference
279 cmReference
Height (hood)
139 cmReference
142 cmReference
Operating weight
2154 kgReference
1179 kgReference
Ballasted weight
2880 kgReference
—
Rear axle
69 mmReference
—
Front tread
121 cmReference
96 to 132 cmReference
Rear tread
131 cmReference
96 to 132 cmReference
Wheelbase
—
177 cmReference
Height (exhaust)
—
167 cmReference
Ground clearance
—
53 cmReference
AR Serial Number Location
AR Serial Numbers
1935
250000 (Unstyled)Reference
—
1936
251486 (Unstyled)Reference
—
1937
253521 (Unstyled)Reference
—
1938
255416 (Unstyled)Reference
—
1939
256700 (Unstyled)Reference
—
1940
257647 (Unstyled)Reference
—
1941
260000 (Unstyled)Reference
—
1942
261125 (Unstyled)Reference
—
1943
262157 (Unstyled)Reference
—
1944
262755 (Unstyled)Reference
—
1945
264198 (Unstyled)Reference
—
1946
265535 (Unstyled)Reference
—
1947
266643 (Unstyled)Reference
10001Reference
1948
268410 (Unstyled)Reference
13734Reference
1949
270131 (Unstyled)Reference
25604Reference
1950
272000 (Styled)Reference
35659Reference
1951
275938 (Styled)Reference
43525Reference
1952
278700 (Styled)Reference
50580Reference
1953
282351 (Styled)Reference
—
Final
284074 (Styled)Reference
55799Reference
Electrical
Ground
positiveReference
positiveReference
Battery volts
6Reference
6Reference
Test results
Belt fuel use (max)
11.7 l/hourReference
7.6 l/hourReference
Max pull
1926 kgReference
1056 kgReference
M Serial Number Location
M Serial Numbers
Links
Speeds
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.


