Astra Imperio

Astra Imperio is a tram produced by the Romanian company Astra Vagoane Călători in Arad. It is a 100% low-floor, designed in partnership with Siemens.^[1][2] Imperio's design is based on the Avenio platform using electronic and traction equipment supplied by Siemens Mobility.^[3][4] It is also available with local electronic and traction equipment supplied by ICPE-SAERP [ro], using IVF 260FR inverters, along with SATREC and MBB31 control units; this variant, called Autentic, uses VEM [de] DKABZ 0310-4 motors instead.^[5]

Astra Imperio/Autentic
Imperio tram in Bucharest
Stock type	Metropolitan
Manufacturer	Astra Vagoane Călători
Assembly	Arad, Romania
Constructed	2011—present
Capacity	45 (Seated) 165 (Standing)
Specifications
Train length	27,000 mm (89 ft)[a]
Width	2,400 mm (7.9 ft)
Height	3,500 mm (11.5 ft)
Floor height	350 mm (1.15 ft)
Low-floor	100%
Entry	320 mm (1.05 ft)
Doors	4
Articulated sections	3
Maximum speed	70 km/h
Weight	37,000 kg (82,000 lb)
Power output	600 kW (4 x 150 kW); 480 kW (4 x 120 kW) or 400 kW (4 x 100 kW)
Electric system(s)	600 V / 750 V DC
Track gauge	1,435 mm (4 ft 8+1⁄2 in) 1,000 mm (3 ft 3+3⁄8 in)
Notes/references
Specifications are for the three-section variant

The tram can be configured as a two to six-section vehicle, each section having a length of 9 m (30 ft), with a powered or unpowered bogie, depending on each operator's needs.^[6] The first deliveries started in October 2014 for the Arad local transport company.^[7]

Technical specifications

The longest tram delivered by Astra Vagoane Călători is the Imperio Metropolitan. These trams were ordered by the Bucharest City Hall administration on behalf of the Bucharest Transport Company (STB).

City	Operator	Model	Gauge	Length	Width	Traction equipment	Traction motors	Axle arrangement	Seats
Arad	CTP Arad [ro]	Imperio Arad	1,000 mm (3 ft 3+3⁄8 in)	26.8 m (88 ft)	2.4 m (7.9 ft)	Siemens	4 × 120 kW (160 hp)	Bo′+2′+Bo′	40–44
		Imperio Civitas		18.6 m (61 ft)		Siemens ICPE-SAERP	4 × 120 kW (160 hp)	Bo′+Bo′	30
Brăila	Braicar [ro]	Imperio Brăila	1,435 mm (4 ft 8+1⁄2 in)	18.6 m (61 ft)		?	?	Bo′+Bo′	38
Bucharest	STB	Imperio Metropolitan		36.1 m (118 ft)		Siemens ICPE-SAERP	4 × 100–150 kW (130–200 hp)	Bo′+2′+2′+Bo′	59
Cluj-Napoca	CTP Cluj-Napoca	Imperio Cluj		27.2 m (89 ft)		Siemens	4 × 100 kW (130 hp)	Bo′+2′+Bo′	36
Galați	Transurb [ro]	Autentic Galați		18.6 m (61 ft)		ICPE-SAERP	4 × 120 kW (160 hp)	Bo′+Bo′	32
Oradea	OTL	Imperio Bihor		27.2 m (89 ft)		Siemens	4 × 100 kW (130 hp)	Bo′+2′+Bo′	45

Product list

Name	Image	Production[8]	Units
Imperio Arad		2014–2015	6
		2019–2020	4
		2023–	1 (5 more contracted)
Imperio Cluj		2020–2021	24
Imperio Oradea		2020–2021	20
		2025–	4 (2 more ordered)[9]
Autentic Galați	Image	2021	8
		2025–	10 more ordered[10]
Imperio Civitas		2021–2024	18
Imperio Metropolitan		2022–2024	100[11]
Imperio Brăila	Image	2023–present	2 (6 more ordered + 2 contracted)[12][13]
Imperio Oradea bi-directional		2025–	3 ordered[9]