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Allis Chalmers D21 vs Deere 2840
Specification differential, power-to-weight analysis, hydraulic benchmarks, and equipment decision guidance.
Allis Chalmers D21
Category: Farm
Deere 2840
Category: Farm
Decisive Performance Differentials
- Allis Chalmers D21 provides +22.4 PTO HP more implement shaft power
- Allis Chalmers D21 provides +800 lbs more unballasted traction mass
Multi-Axis Capability Radar
Normalized 5-pillar operational benchmark comparison
Dual Field Action & Powertrain Sound
Side-by-side operational field footage verified with computer vision & acoustic audits.
Head-to-Head Specification Differential
Side-by-side technical parameters with calculated delta advantage & percent differentials
| Specification | Allis Chalmers D21 | Deere 2840 | Advantage Delta |
|---|---|---|---|
| Power & Output | |||
Rated Engine Horsepower | 119 HP | 89 HP | - |
PTO Horsepower (Tested) | 103.1 HP | 80.7 HP | +27.8%+22.4 PTO HP (+27.8%) |
Traction Density Ratio | 12.5 HP/1k lbs | 10.2 HP/1k lbs | 12.5 vs 10.2 HP / 1,000 lb (higher transport agility) |
| Dimensions & Weight | |||
Base Operating Weight | 9,500 lbs | 8,700 lbs | +9.2%+800 lbs heavier |
| Engine Specs | |||
Displacement | 7 L | 5.4 L | +1.6L larger displacement |
Cylinders | 6 Cylinders | 6 Cylinders | - |
| Chassis & Drivetrain | |||
Drive Configuration | 2WD | 2WD | - |
Transmission System | sliding gear | two-speed power shift | - |
| Hydraulics & Implements | |||
Rear SCV Remotes (Standard) | Optional / Standard | 2 Valves | - |
3-Point Hitch Category | Category III/II | Category II | - |
Buyer Decision Export Tools
Export side-by-side data for forums, Excel spreadsheets, or dealer negotiations
Operational Field Verdict Matrix
Algorithmic suitability assessment cross-referencing Nebraska draft tests against four agricultural workloads.
Primary Tillage & Deep Chisel Plowing
Allis Chalmers delivers higher base frame ballast (+800 lbs) to minimize tire wheel slip under deep draft implement drag.
Large-Scale Air Seeding & Hydraulic Drills
Dedicated remote circuit hydraulic flow ratings are incomplete. Direct comparative seeding capacity requires dealer-verified option build sheets.
Road Hauling & Grain Cart Chase Duty
Allis Chalmers D21 has a sharper 12.53 HP/1,000 lb power-to-weight ratio for rapid hill-climbing acceleration with loaded grain carts.
Soil Compaction & Wet Ground Flotation
Deere 2840 features a lighter footprint (-800 lbs), mitigating subsoil compaction and preserving soil porosity.
Select Allis Chalmers D21 for superior tractive frame ballast and engine power reserves across evaluated field tasks.
Decision Analysis & Editorial Verdict
Allis Chalmers D21 holds the specification advantage across verified metrics, led by higher rated horsepower. For heavy field draft tasks, evaluate D21; for operations sensitive to operating costs or implement compatibility, Deere 2840 remains a direct benchmark contender.
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Equipment Financing & Monthly Payment Estimator
Model cash flows, estimated installment burdens, and financing differentials for agricultural leases or loans.
*Indicative estimates based on standard Tier-1 agricultural commercial rates. Taxes, freight, attachments, and insurance not included.