Allis ChalmersModel A
Allis Chalmers D21 Series II
Row Crop
- power
- 121 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 8
Head to head · Row Crop
Allis Chalmers D21 Series II vs Massey Ferguson 7715S
Massey FergusonModel B
Massey Ferguson 7715S
Row Crop
- power
- 121 hp
- displacement
- 402 ci
- Cylinders
- 6
- Forward gears
- Not recorded
Allis ChalmersAllis Chalmers D21 Series II
vs
Massey FergusonMassey Ferguson 7715S
How they compare
Headline specs vs. the whole Row Crop
Engine Power
= Effectively tiedD21 Series II121 hp
7715S121 hp
Median Row Crop Tractor138 hp
D21 Series II is in the 40th percentile; 7715S is in the 40th · 1,206 models
Engine Displacement
▲ D21 Series II higher · +24 ci (+6%)D21 Series II426 ci
7715S402 ci
Median Row Crop Tractor391 ci
D21 Series II is in the 72nd percentile; 7715S is in the 52nd · 1,409 models
Cylinders
= Effectively tiedD21 Series II6
7715S6
Median Row Crop Tractor6
D21 Series II is in the 50th percentile; 7715S is in the 50th · 1,417 models
Operating Weight
▲ 7715S higher · +5,698 lb (+60%)D21 Series II9,502 lb
7715S15,200 lb
Median Row Crop Tractor12,307 lb
D21 Series II is in the 28th percentile; 7715S is in the 67th · 1,350 models
D21 Series II (A)7715S (B)Median Row Crop Tractor
Full comparison
Every spec, side by side
General Information
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Massey Ferguson | — |
| Model | D21 Series II | 7715S | — |
| Category | Row Crop | Row Crop | Same |
Engine
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | AGCO Power | — |
| Model | 3500 | 66 AWF | — |
| Power Output | 121hp | 121hp | Same |
| Rated RPM | 2,200RPM | 2,100RPM | ▲ D21 Series II+100 RPM · +5% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 402ci | ▲ D21 Series II+24 ci · +6% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 4.7in | ▲ D21 Series II+0.3 in · +6% |
Transmission
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Type | Sliding gear with dry disc clutch | Dyna-6 (24 Speed, selective gear with power shift) | — |
Dimensions & Weight
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Length | 160in | 194in | ▲ 7715S+34 in · +21% |
| Width | 91.3in | 100in | ▲ 7715S+8.7 in · +10% |
| Height | 106in | 119in | ▲ 7715S+13 in · +12% |
| Operating Weight | 9,502lb | 15,200lb | ▲ 7715S+5,698 lb · +60% |
Hydraulics
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| System Type | Not recorded | Closed-center load-sensing | — |
| Pump Flow Capacity | Not recorded | 23.9gpm | — |
| Pressure | Not recorded | 2,875psi | — |
| Steering Type | Power | Power | Same |
Power Take-off (PTO)
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Type | Independent | Not recorded | — |
| Speed 1 | 1,000rpm | 540rpm | ▲ D21 Series II+460 rpm · +85% |
| Speed 2 | Not recorded | 1,000rpm | — |
Tires
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Front Tire Size | Not recorded | 380/85R28 | — |
| Rear Tire Size | Not recorded | 460/85R38 | — |
Hitch & Towing
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | III/II | — |
| Hitch Category | III/II | Category 3 | — |
| Hitch Position | Rear | Rear | Same |
| Hitch Capacity | Not recorded | 27,557lb | — |
Chassis & Drive
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | 4x4 MFWD 4WD | — |
| Drive Type | 2WD | 4WD | — |
| Steering Type | Power | Power | Same |
| Brake Type | Band actuated disc | Multiple wet disc hydraulically operated by two foot pedals | — |
Electrical
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
Capacities
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Coolant | 7.8gal | Not recorded | — |
Operator Station
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 7715S | Difference |
|---|---|---|---|
| Type | Open | Cab | — |
Category context
Both models against the field
Engine Power
median 138 hpA · 40th percentile (121 hp)B · 40th percentile (121 hp)
Engine Displacement
median 391 ciA · 72nd percentile (426 ci)B · 52nd percentile (402 ci)
Cylinders
median 6A · 50th percentile (6)B · 50th percentile (6)
Operating Weight
median 12,307 lbA · 28th percentile (9,502 lb)B · 67th percentile (15,200 lb)
Length
median 180 inA · 25th percentile (160 in)B · 67th percentile (194 in)
A · D21 Series IIB · 7715SMedian Row Crop Tractor