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| Northern Ireland Railways 80 Class | |
|---|---|
 80 Class power car No. 69 in preservation at the Downpatrick and County Down Railway | |
| In service | 1974–2011 (Passenger) 2006–2017 (Sandite) |
| Manufacturer | BREL (British Rail Engineering Limited) |
| Family name | BR Second Generation (Mark 2) |
| Replaced | UTA MED UTA MPD |
| Constructed | 1974–1979 |
| Entered service | 1974–1979 |
| Refurbished | 2006–2011 |
| Scrapped | 1983–2019 |
| Number built | 22 power cars 20 intermediates 26 driving trailers Total: 22 sets |
| Number preserved | 3 sets |
| Number scrapped | 19 sets |
| Formation | 2, 3, 4 or 6 cars per set |
| Capacity | Variable depending on trailer capacity, most 3 car sets up to 210 passengers |
| Operators | Northern Ireland Railways |
| Lines served | At time of withdrawal: Belfast-Derry Belfast-Bangor Belfast-Newry Belfast-Larne Coleraine-Portrush Formerly: Lisburn-Antrim |
| Specifications | |
| Maximum speed | 75 mph (121 km/h) |
| Prime mover(s) | English Electric 4SRKT |
| Safety system(s) | AWS, TPWS |
| Track gauge | Irish gauge – 1,600 mm (5 ft 3 in) |
The 80 Class is a type of diesel electric multiple unit formerly used by Northern Ireland Railways. They were affectionately nicknamed 'Thumpers' by rail enthusiasts due to the thumping noise their engines produced.