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Gravely 450 vs Gravely 816
Verdict: Gravely 450 vs Gravely 816
The Gravely 450 and the Gravely 816 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 17 hp. Gravely 450 is the lighter machine (430 kg vs 435 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely 816 is the newer design (1972 vs 1970). 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
Gravely
62
Fit score
Best match
Clear
Gravely
62
Fit score
Best match
Clear
Rated power
17 hp
17 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
GravelyReference
Two-speed shift-on-the-move affects transmission and PTO speed. Additional two-speed range for transmission can be shifted only when stopped. Right-hand directional clutch lever controls forward and reverse.Reference
The B43M was used on the Gravely 816 for the final production year, in 1978.Reference
Engine
Fuel tank
20.1 LReference
20.1 LReference
Displacement
49.8 ciReference
43.7 ciReference
Bore/Stroke
76 x 83 mmReference
83 x 67 mmReference
Power
12.3 kWReference
11.9 kWReference
Air cleaner
dry elementReference
—
Rated RPM
3600Reference
3600Reference
Starter volts
12Reference
12Reference
Sparkplug gap
0.635 mmReference
0.635 mmReference
Intake valve clearance
0.279 mmReference
0.279 mmReference
Exhaust valve clearance
0.279 mmReference
0.279 mmReference
Oil capacity
4.7 LReference
5.7 LReference
Starter
—
electricReference
Transmission
Transmission
Swiftamatic 8Reference
—
Type
shaft-driven gearReference
shaft-driven gearReference
Gears
4 forward and reverseReference
8 forward and 4 reverseReference
Oil type
SAE 90W-EPReference
SAE30Reference
Dimensions
Weight
430 kgReference
435 kgReference
Front tire
16x6.50-8Reference
16x6.50-8Reference
Rear tire
23x8.50-12Reference
23x8.50-12Reference
Lawn/turf front
16x6.50-8Reference
16x6.50-8Reference
Lawn/turf rear
23x8.50-12Reference
23x8.50-12Reference
Length
191 cmReference
191 cmReference
Width
106 cmReference
106 cmReference
Height
109 cmReference
109 cmReference
Shipping weight
430 kgReference
435 kgReference
Gravely 450 attachments
450 Serial Numbers
Location:
Ahead of rear axle on left side.Reference
In front of, and below, air cleaner.Reference
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
Battery AH
—
43Reference
Battery Group
—
22FReference
Attachment overview
Gravely 816 attachments
816 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.