
John DeereModel A
John Deere 8420
Row Crop
- power
- 270 hp
- displacement
- 496 ci
- Cylinders
- 6
- Forward gears
- 16
Head to head · Row Crop

Row Crop
Row Crop
How they compare
8420 is in the 90th percentile; 8690 is in the 96th · 1,206 models
8420 is in the 85th percentile; 8690 is in the 92nd · 1,409 models
8420 is in the 50th percentile; 8690 is in the 50th · 1,417 models
8420 is in the 93rd percentile; 8690 is in the 95th · 1,350 models
Full comparison
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Manufacturer | John Deere | Massey Ferguson | — |
| Model | 8420 | 8690 | — |
| Category | Row Crop | Row Crop | Same |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Manufacturer | John Deere | Sisu Diesel | — |
| Model | Not recorded | 84 CTA | — |
| Power Output | 270hp | 340hp | ▲ 8690+70 hp · +26% |
| Rated RPM | 2,200RPM | 2,100RPM | ▲ 8420+100 RPM · +5% |
| Cylinders | 6 | 6 | Same |
| Displacement | 496ci | 513ci | ▲ 8690+17 ci · +3% |
| Bore | 4.6in | 4.4in | ▲ 8420+0.2 in · +5% |
| Stroke | 5.1in | 5.7in | ▲ 8690+0.6 in · +12% |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Type | Full power shift | CVT. A combination of mechanical and hydrostatic sections that allow an infinite speed adjustment within two mechanical ranges. | — |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Length | 212in | 223in | ▲ 8690+11 in · +5% |
| Width | Not recorded | 100in | — |
| Height | 122in | 133in | ▲ 8690+11 in · +9% |
| Operating Weight | 23,955lb | 25,365lb | ▲ 8690+1,410 lb · +6% |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| System Type | Closed center pressure-flow compensated (PFC) | Closed Center Load Sensing with two outlet sets combined | — |
| Steering Type | Hydrostatic power | Hydrostatic power | Same |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Type | Independent with hydraulic wet discs clutch | Not recorded | — |
| Speed 1 | 1,000rpm | 1,000rpm | Same |
| Speed 2 | 540rpm | Not recorded | — |
| Speed 3 | 1,000rpm | Not recorded | — |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Front Tire Size | Not recorded | 600/65R34 | — |
| Rear Tire Size | 480/80R46 | 710/75R42 | — |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Hitch Type | III/IIIN | Three-Point Hitch | — |
| Hitch Category | Category 3 | Category 3 | Same |
| Hitch Position | Rear | Rear | Same |
| Hitch Capacity | 17,897lb | 22,758lb | ▲ 8690+4,861 lb · +27% |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Chassis Type | 4x4 MFWD 4WD | 4x4 MFWD 4WD | Same |
| Drive Type | 4WD | 4WD | Same |
| Steering Type | Hydrostatic power | Hydrostatic power | Same |
| Brake Type | Hydraulic wet disc | Not recorded | — |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Coolant | 9gal | Not recorded | — |
| Spec | John Deere 8420 | Massey Ferguson 8690 | Difference |
|---|---|---|---|
| Type | Cab (standard) | Cab | — |
Category context