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Samson S25 Sieve-Grip vs Waterloo Boy R California Special

Verdict: Samson S25 Sieve-Grip vs Waterloo Boy R California Special

The Samson S25 Sieve-Grip and the Waterloo Boy R California Special are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. Samson S25 Sieve-Grip is the lighter machine (2,630 kg vs 2,812 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Waterloo Boy R California Special holds more fuel (75.7 L vs 68.1 L) for longer stints between fills. Samson S25 Sieve-Grip is the newer design (1916 vs 1914). 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
Samson S25 Sieve-Grip Tractor
Samson
62
Fit score
Best match
Clear
Waterloo Boy R California Special Tractor
Waterloo Boy
62
Fit score
Best match
Clear
Rated power
12 hp
12 hp
Confidence
40%
40%
Guide price
Overview
Manufacturer
SamsonReference
Waterloo BoyReference
liquid-cooledReference
The final Waterloo Boy model R engine, used from 1917 to the end of production. This engine size continued to be used in the Waterloo Boy model N and the early John Deere model D.Reference
Final drives
bull gearReference
Total built
9,310Reference
Original price
$850 (1917)Reference
Drive
3x2 2WDReference
Engine
Fuel tank
68.1 LReference
75.7 LReference
Drawbar (claimed)
8.9 kWReference
8.9 kWReference
Belt (claimed)
21.1 kWReference
18.6 kWReference
Plows
3Reference
3 (14-inch)Reference
Displacement
6.3 LReference
7.6 LReference
Bore/Stroke
108 x 171 mmReference
165 x 178 mmReference
Rated RPM
650Reference
750Reference
Sparkplug
AC Titan 0.875Reference
Aux. fuel
3.8 LReference
Compression
3.91:1Reference
Firing order
1-2Reference
Starter type
hand-crankReference
Coolant capacity
32.2 LReference
Transmission
Type
gearReference
unsynchronized gearReference
Gears
2 forwardReference
1 forward and reverseReference
Dimensions
Weight
2630 kgReference
2812 kgReference
Front tire
41x18Reference
28Reference
Ag front
41x18 (steel)Reference
28 x 6 steelReference
Length
381 cmReference
363 cmReference
Height
127 cmReference
160 cmReference
Shipping weight
2630 kgReference
Rear tire
52Reference
Ag rear
52 x 10 steelReference
Capacities
Diameter
30 cmReference
Width
160 cmReference
182 cmReference
RPM
750Reference
Speed
719.33 meters/minReference
R California Special Serial Numbers
1914
1071Reference
1915
1556Reference
1916
2627Reference
1917
4892Reference
Final
7312Reference

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.

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