Multi-model comparison
Side-by-side tractor comparison
Compare technical specifications, horsepower ratings, hydraulic capacities, and dimensions across all tractor models.
Head-to-Head Arena Spotlight
Direct technical match-up between flagship models
60/72" deckUnknown
39HP
F3990Archived Specification Record
VS
+15.4%
45 HP
Quick Takeaways:⚡ Rated Power: Bukh D-45 (+6.0 HP / +15.4%)🛢️ Displacement: Bukh D-45 (+1.6 L)
Model overview
3 selected
60/72" deckUnknown
39HP
F3990Archived Specification Record
Kubota
F3990
Catalog archiveEngine and power
Rated horsepower
39 HP
45 HP
960 HP+915.0 HP
PTO horsepower
—
—
—
Engine displacement
1.5 L
3.1 L
24.1 L+21.0 L
Cylinders
4 cylinders
3 cylinders
16 cylinders
Fuel type
Diesel
Diesel
Diesel
Transmission and drive
Drive system
Unknown
2WD
4WD
Transmission type
Hydrostatic
—
Power shift (6F/1R)
Forward / reverse gears
— fwd / — rev
9 fwd / 2 rev
6 fwd / 1 rev
Weight and capacities
Operating weight
778 kg
—
43,092 kg+42,314 kg
Hydraulic total flow
—
—
65 GPM★ Leader
ASABE Field Implement Capacity Matchup
Max Subsoiler (12" depth)
1 Shanks
1 Shanks
24 Shanks+23 Shanks
Max Disk Harrow (8 mph)
6 ft (2 m)
6 ft (2 m)
62 ft (19 m)+56 ft
Max Air Seeder (5.5 mph)
15 ft (5 m)
15 ft (5 m)
124 ft (38 m)+109 ft
Target Ballast & Balance
Heavy-draft standard (30/70 for 2WD, 40/60 for MFWD, 55/45 for 4WD)
2,317 lbs(Est. Cap)
30% Front / 70% Rear
6,525 lbs
30% Front / 70% Rear
115,200 lbs
55% Front / 45% Rear
Est. Fuel Burn (75% Load)
1.4 gal/h (5.3 L/h)
1.6 gal/h (6.1 L/h)
34.6 gal/h (131 L/h)
Provenance and serial decoders
Production years
—
1958–1960
1978
Assembly factory
—
—
—
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