Here are brochures of old model Eicher tractors i.e. at about year 2000 and some engine brochures with specifications:
Brochures of old models:
| Technical Specifications | Model 422 ES | Model 421 ES |
| BORE * STROKE | 100 X 125 mm | 100 X 125 mm |
| Displacement | 2945 cc | 2945 cc |
| Valve clearances | 0.10 mm for intake & exhaust | 0.10 mm for intake & exhaust |
| Injection Pressure | 240+8 kg/cm2 | 240+8 kg/cm2 |
| Compression ratio | 16.3 : 1 | 16.3 : 1 |
| Compression Pressure | 27-29 kg/cm2 | 27-29 kg/cm2 |
| Governor | Mechanical, Centrifugal ‘A2’ | Mechanical, Centrifugal ‘A2’ |
| Specific fuel consumption | 160 gms/bhp/hr. | 174 gms/bhp/hr. |
| Lubrication oil consumption | 0.8 gms/bhp/hr. | 0.8 gms/bhp/hr. |
| High idle RPM | 1560+5 | 2236+7 |
| Low idle RPM | 675 + 25 | 675 + 25 |
| Engine weight in approx. | 490 kgs (app.) | 450 kgs (app.) |
| Dimensions (mm) Length x Width x Height | 890 x 1110 x 1990 | 890 x 1110 x 1990 |