Massey Ferguson 8690 VS Allis Chalmers HD21 specs comparison
                                         
                                        
                                    
                                
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        Massey Ferguson 8690
General Infos| Make | Massey Ferguson | 
| Model | 8690 | 
| Country | United states | 
| Production | From 2011 Until 2013 | 
| Price | - | 
| Tractor type | Row Crop tractor | 
| Fuel | diesel | 
| Service repair manual | Massey Ferguson 8690 Manual | 
Dimensions, sizes and tires
| AG front tires | 420/85R34 | 
| AG rear tires | 480/80R50 (duals) | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 22250 lbs or 10092 kg | 
| Length | 223.2 inches [566 cm] | 
| Width | 100.4 inches [255 cm] (min) | 
| Height | 133.1 inches [338 cm] | 
| Wheelbase | 122.2 inches [310 cm] | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | - | 
| Front tread size | - | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 512.6 ci or 8.4 L | 
| Cylinders | 6 cylinders | 
| Engine power | 340 hp or 253.5 kW | 
| Engine RPM | 2100 (rpm) | 
| Torque | 1136 lb-ft or 1540.4 Nm | Torque RPM | 1500 (rpm) | 
| Fuel type | diesel | 
| Fuel injection | common rail | 
| Fuel tank size | 167 gal or 632.1 L | 
| Oil capacity | - | 
| Oil change | - | 
| Starter motor | electric | 
| Starter volts | 12 V | 
| Parts And Accessories | Massey Ferguson 8690 Parts | 
| Batteries number | 2 | 
| Batteries voltage | 12 V | 
| Battries Amps | - | 
| Cold Amps | 775 | 
| Ground force | negative | 
| Charging system | alternator | 
| Charging Volts | - | 
| Charging Amps | 240 amps | 
| Trans system | Dyna-VT | 
| Trans type | continuously-variable transmission (CVT) | 
| Trans gears | infinite (2-range) forward and reverse | 
| Clutch system | - | 
| Wheel drive | 4x4 MFWD 4WD | 
| Final drive | inboard planetary | 
| Steering | hydrostatic power | 
| Braking system | hydraulic wet disc | 
| Cabin type | Cab standard with heat and air-conditioning | 
| Differentiel lock | electro-hydraulic | 
| System | closed center load sensing | 
| Valves | 4 to 6 | 
| Pump flow | 46 gpm or 174.1 lpm | 
| SVC flow | 26.4 gpm or 99.9 lpm | 
| Steering flow | - | 
| Tank capacity | - | 
| Hydraulic pressure | 2901 psi or 200.0 bar | 
| Max flow | - | 
| Drawbar type | - | 
| Claimed power | - | 
| Drawbar horsepower | 245.7 hp or 183.2 kW | 
| Fuel consumption | 16.5 gal/hour or 62.5 l/hour | 
| Pulling power | 25170 lbs or 11417 kg | 
| Claimed power | 290 hp or 216.3 kW | 
| Real power | 331.0 hp or 246.8 kW | 
| Engine @RPM | - | 
| PTO Clutch | - | 
| Rear PTO | independent | 
| Rear PTO RPM | 1000E (rpm) | 
| Front PTO | optional | 
| Front PTO RPM | 1000 (rpm) | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | 17.6 gal/hour or 66.6 l/hour | 
| Hitch system | - | 
| Rear hitch | III | 
| Rear hitch lift | 21336 lbs or 9678 kg | 
| Front hitch | - | 
| Front hitch lift | 11000 lbs or 4989 kg | 
                                        
                                    
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        Allis Chalmers HD21
General Infos| Make | Allis Chalmers | 
| Model | HD21 | 
| Country | United states | 
| Production | From 1954 Until 1965 | 
| Price | - | 
| Tractor type | Agricultural Crawler tractor | 
| Fuel | diesel | 
| Service repair manual | Allis Chalmers HD21 Manual | 
Dimensions, sizes and tires
| AG front tires | tracks | 
| AG rear tires | tracks | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 45500 lbs or 20638 kg | 
| Length | 198 inches [502 cm] | 
| Width | - | 
| Height | 99 inches [251 cm] | 
| Wheelbase | - | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | - | 
| Front tread size | - | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 844 ci or 13.8 L | 
| Cylinders | 6 cylinders | 
| Engine power | 225 hp or 167.8 kW | 
| Engine RPM | 1800 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | - | 
| Fuel tank size | 135 gal or 511.0 L | 
| Oil capacity | - | 
| Oil change | - | 
| Starter motor | - | 
| Starter volts | 24 V | 
| Parts And Accessories | Allis Chalmers HD21 Parts | 
| Batteries number | 2 | 
| Batteries voltage | 12 V | 
| Battries Amps | - | 
| Cold Amps | - | 
| Ground force | - | 
| Charging system | - | 
| Charging Volts | - | 
| Charging Amps | - | 
| Trans system | - | 
| Trans type | torque converter | 
| Trans gears | 2 forward and 1 reverse | 
| Clutch system | - | 
| Wheel drive | crawler | 
| Final drive | - | 
| Steering | - | 
| Braking system | contracting band | 
| Cabin type | Open operator station | 
| Differentiel lock | - | 
| System | - | 
| Valves | - | 
| Pump flow | - | 
| SVC flow | - | 
| Steering flow | - | 
| Tank capacity | - | 
| Hydraulic pressure | - | 
| Max flow | - | 
| Drawbar type | - | 
| Claimed power | - | 
| Drawbar horsepower | 135.12 hp or 100.8 kW | 
| Fuel consumption | - | 
| Pulling power | 40563 lbs or 18399 kg | 
| Claimed power | - | 
| Real power | - | 
| Engine @RPM | - | 
| PTO Clutch | - | 
| Rear PTO | - | 
| Rear PTO RPM | - | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | - | 
| Hitch system | - | 
| Rear hitch | - | 
| Rear hitch lift | - | 
| Front hitch | - | 
| Front hitch lift | - | 
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Useful links and guides ....
- Massey Ferguson provided us with the latest version of its 8690 service repair manual
 - Find All mechanical and electrical parts and accessories of Massey Ferguson 8690 farm-tractor here
 
- Get your Allis Chalmers HD21 manual book version
 - Cabine, electrical And mechanical parts for Allis Chalmers HD21 farm-tractor here