Fiat 750S VS Allis Chalmers D21 Series I specs comparison
                                         
                                        
                                    
                                
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        Fiat 750S
General Infos| Make | Fiat | 
| Model | 750S | 
| Country | Italy | 
| Production | From 1971 Until 1975 | 
| Price | - | 
| Tractor type | - | 
| Fuel | diesel | 
| Service repair manual | Fiat 750S Manual | 
Dimensions, sizes and tires
| AG front tires | 7.50-20 | 
| AG rear tires | 13.6-38 | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 7,276 lbs or 3300 kg | 
| Length | 140.2 inches [356 cm] | 
| Width | - | 
| Height | - | 
| Wheelbase | 96.1 inches [244 cm] | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | - | 
| Front tread size | - | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 278.37 ci or 4.6 L | 
| Cylinders | 4 cylinders | 
| Engine power | 80 hp or 59.7 kW | 
| Engine RPM | 2100 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | - | 
| Fuel tank size | 20.6 gal or 78.0 L | 
| Oil capacity | - | 
| Oil change | - | 
| Starter motor | - | 
| Starter volts | - | 
| Parts And Accessories | Fiat 750S Parts | 
| Batteries number | - | 
| Batteries voltage | - | 
| Battries Amps | - | 
| Cold Amps | - | 
| Ground force | - | 
| Charging system | - | 
| Charging Volts | - | 
| Charging Amps | - | 
| Trans system | - | 
| Trans type | - | 
| Trans gears | 7 forward and 2 reverse | 
| Clutch system | - | 
| Wheel drive | 4x2 2WD | 
| Final drive | - | 
| Steering | - | 
| Braking system | - | 
| Cabin type | - | 
| Differentiel lock | - | 
| System | - | 
| Valves | - | 
| Pump flow | 7.4 gpm or 28.0 lpm | 
| SVC flow | - | 
| Steering flow | - | 
| Tank capacity | - | 
| Hydraulic pressure | - | 
| Max flow | - | 
| Drawbar type | - | 
| Claimed power | - | 
| Drawbar horsepower | - | 
| Fuel consumption | - | 
| Pulling power | - | 
| Claimed power | - | 
| Real power | - | 
| Engine @RPM | - | 
| PTO Clutch | - | 
| Rear PTO | - | 
| Rear PTO RPM | 540 (rpm) | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | - | 
| Hitch system | - | 
| Rear hitch | - | 
| Rear hitch lift | 4630 lbs or 2100 kg | 
| Front hitch | - | 
| Front hitch lift | - | 
                                        
                                    
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        Allis Chalmers D21 Series I
General Infos| Make | Allis Chalmers | 
| Model | D21 Series I | 
| Country | United states | 
| Production | From 1963 Until 1969 | 
| Price | - | 
| Tractor type | Row Crop tractor | 
| Fuel | diesel | 
| Service repair manual | Allis Chalmers D21 Series I Manual | 
Dimensions, sizes and tires
| AG front tires | 11.00x16 | 
| AG rear tires | 24.5x32 | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 9500 lbs or 4309 kg | 
| Length | 160.6 inches [407 cm] | 
| Width | 91.6 inches [232 cm] | 
| Height | - | 
| Wheelbase | 96.1 inches [244 cm] | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | - | 
| Front tread size | - | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 426 ci or 7.0 L | 
| Cylinders | 6 cylinders | 
| Engine power | - | 
| Engine RPM | 2200 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | - | 
| Fuel tank size | 52 gal or 196.8 L | 
| Oil capacity | 12 qts or 11.4 L | 
| Oil change | - | 
| Starter motor | - | 
| Starter volts | - | 
| Parts And Accessories | Allis Chalmers D21 Series I Parts | 
| Batteries number | 2 | 
| Batteries voltage | 12 V | 
| Battries Amps | 95 amps | 
| Cold Amps | - | 
| Ground force | negative | 
| Charging system | Delco-Remy generator | 
| Charging Volts | - | 
| Charging Amps | 32 amps | 
| Trans system | Power Director | 
| Trans type | sliding gear | 
| Trans gears | 8 forward and 2 reverse | 
| Clutch system | dry disc | 
| Wheel drive | 4x2 2WD | 
| Final drive | - | 
| Steering | power | 
| Braking system | band actuated disc | 
| 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 | 93 hp or 69.4 kW | 
| Drawbar horsepower | 93.09 hp or 69.4 kW | 
| Fuel consumption | 7.1 gal/hour or 26.9 l/hour | 
| Pulling power | 14,840 lbs or 6731 kg | 
| Claimed power | 103 hp or 76.8 kW | 
| Real power | 103.06 hp or 76.9 kW | 
| Engine @RPM | - | 
| PTO Clutch | - | 
| Rear PTO | independent | 
| Rear PTO RPM | 1000 (rpm) | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | 7.1 gal/hour or 26.9 l/hour | 
| Hitch system | - | 
| Rear hitch | III/II | 
| Rear hitch lift | - | 
| Front hitch | - | 
| Front hitch lift | - | 
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Useful links and guides ....
- Fiat provided us with the latest version of its 750S service repair manual
 - Find All mechanical and electrical parts and accessories of Fiat 750S farm-tractor here
 
- Get your Allis Chalmers D21 Series I manual book version
 - Cabine, electrical And mechanical parts for Allis Chalmers D21 Series I farm-tractor here