Kubota F3990 vs Roper lawn tractors K521
Side-by-side specs comparison
Verdict by the numbers
- The Kubota F3990 is more powerful than the Roper lawn tractors K521: 39 HP versus 5 HP (+34 HP, +680%).
- The Kubota F3990 is the more recent model: production started in 2014, versus 1973 for the Roper lawn tractors K521.
- The Kubota F3990 is heavier: 778 kg versus 133 kg for the Roper lawn tractors K521.
- The Kubota F3990 has the wider mower deck: 60" versus 26".
Full specs comparison
| Kubota F3990 | Roper lawn tractors K521 | |
|---|---|---|
| Power | 39 HP | 5 HP |
| Production years | 2014–2024 | 1973–1976 |
| Fuel | Diesel | Gasoline |
| Cylinders | 4 | 1 |
| Weight | 778 kg | 133 kg |
| Drive | 4WD | 2WD |
| Transmission | Hydrostatic | — |
| Gears (fwd/rev) | — | 3 / 1 |
| Wheelbase | 130 cm | 102 cm |
| Length | 251 cm | 146 cm |
| Mower deck | 60" | 26" |
Frequently asked questions
Which is more powerful, the Kubota F3990 or the Roper lawn tractors K521?
The Kubota F3990 is more powerful than the Roper lawn tractors K521: 39 HP versus 5 HP (+34 HP, +680%).
Which is more recent, the Kubota F3990 or the Roper lawn tractors K521?
The Kubota F3990 is the more recent model: production started in 2014, versus 1973 for the Roper lawn tractors K521.
Which is heavier, the Kubota F3990 or the Roper lawn tractors K521?
The Kubota F3990 is heavier: 778 kg versus 133 kg for the Roper lawn tractors K521.
Which has the wider mower deck, the Kubota F3990 or the Roper lawn tractors K521?
The Kubota F3990 has the wider mower deck: 60" versus 26".