| FC2121C | Specifications |
| Engine
| Volvo D6E |
| Rated output at | 1,800 r/min (30 r/sec) |
| ...SAE J1995 gross | 165 hp (123 kW) |
| ...ISO 9249/SAE J1349 net | 147 hp (110 kW) |
| Max. engine torque | 553 ft lb (735 Nm) |
| Max. reach from swing center | 27' 9'' (8460 mm) |
| ...with boom / arm | 18' 8'' / 9' 6'' (5.7 m / 2.9 m) |
| Max. tractive effort | 41,140 lb (183 kN) |
| Max. speed | 3.4 mph (5.5 km/h) |
| Operating weight (with std boom/arm, excluding attachment) | 51,880 - 54,000 lb (23,530 - 24,490 kg) |