| Renfe Class 321 | |
| Powertype: | Diesel-electric |
| Designer: | American Locomotive Company |
| Builder: | Alco (8) Euskalduna (72) |
| Ordernumber: | Alco: 3379 |
| Serialnumber: | Alco S-3379-01 to S-3379-08 |
| Buildmodel: | Alco FPD-9 or DL500S |
| Builddate: | 1965 - 1971 |
| Totalproduction: | 80 |
| Aarwheels: | C-C |
| Wheeldiameter: | 1016mm[1] |
| Length: | 18567mm |
| Locoweight: | 111 t |
| Primemover: | Alco 12-251C |
| Tractionmotors: | GE 761 (6 off) |
| Maxspeed: | 120abbr=onNaNabbr=on |
| Poweroutput: | At flywheel: 2160CV At rail: 1250kW continuous |
| Operator: | Renfe, Adif |
| Operatorclass: | Serie 321 de Renfe |
| Fleetnumbers: | 2101 – 2180, later 321-001 – 321-080 |
| Locale: | Spain |
The Renfe Class 321 (formerly 2100 series) is a class of diesel-electric locomotives operated by Renfe in Spain, designed by Alco and built by them and by Euskalduna under licence.
The locomotives have a Co-Co wheel arrangement, and are equipped with GEC 5G-761 engines.[2]
Production started in 1965. A total of 80 locomotives were built until 1971,[3] with the first eight built by Alco, and the remaining 72 by Euskalduna.[4] Four locomotives were rebuilt for Spanish; Castilian: Teco de Media Distancia freight service trials.[2]
Regular services with Renfe have ended, and some locomotives are used by Adif to haul maintenance trains.[4]