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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

FeatureKomatsu D20P-3DozerKomatsu D21A-3Dozer
TypeCrawler DozerCrawler Dozer
Horsepower26.1 kW27.6 kW
Operating Weight3600.0 kg3430.0 kg
Engine ManufacturerKomatsuKomatsu
Engine Model4 D92-1A4 D92-1
Gross Power26.1 kW27.6 kW
Number of Cylinders44
Displacement2600.6 cc2605.5 cc
Power Measured RPM2450 RPM2450 RPM
Transmission TypeDirect DriveHydrostatic
Number of Forward Gears33
Number of Reverse Gears23
Ground Pressure0.2 bar0.3 bar
Cab Height213.4 cm210.3 cm
Width Over Track185.9 cm155.4 cm
Length Overall326.1 cm347.5 cm
Length without Blade249.9 cm246.9 cm
Length of Track on Ground167.6 cm167.6 cm
Track Gauge134.1 cm121.9 cm
Ground Clearance39.6 cm33.5 cm
No of Shoes Per Side3737
No of Track Rollers Per Side55
Shoe Size51.1 cm30.2 cm
Weight (Operating)3600.0 kg3430.0 kg
Track Pitch13.7 cm13.7 cm
Max Speed Forward—6.9 km/h
Max Speed Reverse—6.4 km/h
Fuel Capacity—60.2 l
Cooling System Capacity—14.0 l
Sourceheavyequipments.net archive (imported 2026-10)heavyequipments.net archive (imported 2026-10)
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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051