SPECS / COMPARISON
John Deere 820 vs David Brown 770 Selectamatic
A detailed comparison of the John Deere 820 and the David Brown 770 Selectamatic. Click a model name to view its full specifications.
Horsepower
John Deere 82023.9 kW (32.1 HP)
David Brown 770 Selectamatic26.8 kW (35.9 HP)
| Specification | John Deere 820 Agricultural Tractors | David Brown 770 Selectamatic Agricultural Tractors |
|---|---|---|
| Tractor Type | Utility Tractor | Utility Tractor |
| Horsepower | 23.9 kW (32.1 HP) | 26.8 kW (35.9 HP) |
| Transmission Type | Collar shift | Gear type with dry disc clutch |
| Length | 342.0 cm (134.6 in.) | 285.0 cm (112.2 in.) |
| Years Made | 1968-1973 | 1965-1970 |
| Engine Model | John Deere | David Brown AD3/49 |
| Engine Type | 4-stroke, liquid-cooled, inline | 4-stroke, liquid-cooled, inline |
| Fuel Type | Diesel | Diesel |
| Cylinders | 3 | 3 |
| Displacement | 2489 cc (151.9 cu in.) | 2394 cc (146.1 cu in.) |
| Bore | 9.80 cm (3.86 in.) | 10.01 cm (3.94 in.) |
| Stroke | 11.00 cm (4.33 in.) | 10.21 cm (4.02 in.) |
| Rear PTO Type | Live | Live |
| Rear PTO Speed | 540 RPM | 540 RPM |
| Rated RPM | 2100 RPM | 2055 RPM |
| Compression Ratio | 16.7:1 | 17.0:1 |
| Battery | Two 12V, 55Ah | 12 V, 96Ah |
| Starter | Electric | Electric |
| Height | 199.0 cm (78.3 in.) | 204.0 cm (80.3 in.) |
| Wheelbase | 188.0 cm (74.0 in.) | 190.0 cm (74.8 in.) |
| Fuel Tank Capacity | 62.5 l (16.5 gal) | 43.0 l (11.4 gal) |
| Oil Capacity | 6.2 l (1.6 gal) | 7.4 l (2.0 gal) |
| Hydraulic Capacity | 37.9 l (10.0 gal) | — |
| Gears | 8 forward and 4 reverse | 12 forward and 4 reverse |
| Chassis | 4×2 2WD | 4×2 2WD |
| Differential Lock | Mechanical rear | Mechanical rear |
| Drawbar Category | I | I |
| Cabin Type | Open operator station or ROPS | Open operator station |
| Front Tires | Ag: 5.50-16, 6.00-16Lawn/turf: 27/9.5-15, 23/10.5-12 | Ag: 6.00-16, 5.50-16 |
| Rear Tires | Ag: 12.2-28, 13.6-28Lawn/turf: 16.9-24, 16.5L-16 | Ag: 12.4/11-28, 11.2/10-28 |
| Hydraulic Type | Open center | Open center |
| Weight | — | 1485.0 kg (3273.9 lbs) |
| Torque Power | — | 1400 RPM |
| Torque Speed | — | 135.6 N·m (100.0 lb-ft) |
| Coolant Capacity | — | 11.4 l (3.0 gal) |
| Transmission Oil Capacity | — | 27.3 l (7.2 gal) |
| Final Drive | — | Spur gear |
| Max. Travel Speed | — | 12.9 km/h (Forward: 14.8 MPH (23.8 km/h) Reverse: 8.0 MPH) |
| Brakes | — | Mechanical drum |
| Hitch Type | — | Position and draft control |
| Steering Type | — | Manual |
| Working Pressure | — | 137.9 bar (2000.0 psi) |
Values come from the manufacturer-sourced model files; empty cells mean the property is not published for that model. No performance ranking is applied.