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County 764 (1978–1990) vs Zetor 6421
Specification differential, power-to-weight analysis, hydraulic benchmarks, and equipment decision guidance.
County 764 (1978–1990)
Category: Farm
Zetor 6421
Category: Farm
Decisive Performance Differentials
- County 764 (1978–1990) provides +17 PTO HP more implement shaft power
- County 764 (1978–1990) provides +829 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 | County 764 (1978–1990) | Zetor 6421 | Advantage Delta |
|---|---|---|---|
| Power & Output | |||
Rated Engine Horsepower | 85.8 HP | 64 HP | - |
PTO Horsepower (Tested) | 77 HP | 60 HP | +28.3%+17 PTO HP (+28.3%) |
Traction Density Ratio | 10.6 HP/1k lbs | 8.8 HP/1k lbs | 10.6 vs 8.8 HP / 1,000 lb (higher transport agility) |
| Dimensions & Weight | |||
Base Operating Weight | 8,069 lbs | 7,240 lbs | +11.5%+829 lbs heavier |
| Engine Specs | |||
Displacement | 4.4 L | 4.2 L | +0.2L larger displacement |
Cylinders | 4 Cylinders | 4 Cylinders | - |
| Hydraulics & Implements | |||
Standard Hydraulic Pump Flow | N/A (Check Option Pack) | 18 gpm | - |
Rear SCV Remotes (Standard) | Optional / Standard | 3 Valves | - |
3-Point Hitch Category | Category II | Category II/I | - |
| Chassis & Drivetrain | |||
Drive Configuration | 4WD | 2WD | - |
Transmission System | Mechanical / PowerShift | syncromesh | - |
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
County delivers higher base frame ballast (+829 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
County 764 (1978–1990) has a sharper 10.63 HP/1,000 lb power-to-weight ratio for rapid hill-climbing acceleration with loaded grain carts.
Soil Compaction & Wet Ground Flotation
Zetor 6421 features a lighter footprint (-829 lbs), mitigating subsoil compaction and preserving soil porosity.
Select County 764 (1978–1990) for superior tractive frame ballast and engine power reserves across evaluated field tasks.
Decision Analysis & Editorial Verdict
County 764 (1978–1990) holds the specification advantage across verified metrics, led by higher rated horsepower. For heavy field draft tasks, evaluate 764; for operations sensitive to operating costs or implement compatibility, Zetor 6421 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.