ÖBB class 4020 is a 3 part electric multiple unit operated by the ÖBB (Austrian Federal Railways or Österreichische Bundesbahnen), built from 1978 until 1987 as successor of the ÖBB 4030 class.

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Quick Facts In service, Manufacturer ...

ÖBB 4020
4020 262 in Perchtoldsdorf
In service	1978 – 2025 (planned)
Manufacturer	SGP, BBC, Siemens ASEA
Constructed	1978–1987
Number built	120 trainsets
Capacity	184 (56+64+64)
Operators	ÖBB
Specifications
Car length	23.3 m (76 ft 5+5⁄16 in) (rail carriage) 22.8 m (74 ft 9+5⁄8 in) (intermediate carriages)
Width	2.872 m (9 ft 5+1⁄16 in)
Height	3.75 m (12 ft 3+5⁄8 in)
Maximum speed	120 km/h (75 mph)
Acceleration	0.7 m/s/s (1.6 mph/s)
Electric system(s)	15 kV  16.7 Hz AC
Safety system(s)	Sifa, PZB90
Track gauge	1,435 mm (4 ft 8+1⁄2 in)

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The 4020 class is used extensively on many regional rail routes, including the Vienna S-Bahn. Most trains bear the older blue ÖBB logo, meanwhile some, have received a new paint scheme with grey and red color, similar to that of the new ÖBB 4024 Talent trains.^[1]