© trainspo.comSiemens Alfa Pendular 4000
Built by Adtranz, Fiat, Siemens
Overview of the Siemens Alfa Pendular 4000
Discover the Alfa Pendular 4000, a state-of-the-art electric multiple unit renowned for its speed and comfort.
This train, also known as the CP 4000, is a proud member of the esteemed Pendolino family, representing the second generation of this advanced tilting train technology.
Built by Adtranz, Fiat, and Siemens between 1999 and 2001, the Alfa Pendular 4000 is capable of reaching impressive speeds of up to 220 km/h.
Measuring 159 meters in length, it offers a seating capacity of 301 passengers, with 96 seats in first class and 203 in second class, ensuring ample space for travelers.
Featuring advanced 25 kV AC 50 Hz electric systems and a powerful 4000 kW output, it boasts a substantial tractive effort of 210 kN.
Operating on a 1668 mm gauge, this locomotive is a significant asset to the Trains of Portugal.
Siemens Alfa Pendular 4000 technical specifications
| Value | Imperial / US | |
|---|---|---|
| Series | Pendolino Second Generation | |
| Family | Pendolino | |
| Built by | Adtranz, Fiat, Siemens · 1999–200110 units | |
| Top speed | 220 km/h137 mph | |
| Power output | 4,000 kW5,364 hp | |
| Tractive effort | 210 kN47,210 lbf | |
| Electric systems |
| |
| Track gauge | 1,668 mmIberian gauge5 ft 5⅝ in | |
| Formation | 6 cars (4M2T) | |
| Capacity | 301, 1st class 96, 2nd class 203 seats | |
| Train length | 159 m521 ft 8 in | |
| Width | 2.92 m9 ft 7 in | |
| Height | 4.39 m14 ft 5 in | |
| Weight | 298 t656,977 lb |
Operators of the Siemens Alfa Pendular 4000
Railway companies that have operated the Alfa Pendular 4000, with the class designation used by each of them.
| Operator | Class | Country |
|---|---|---|
| Trains of Portugal | CP 4000 | Portugal |
Siemens Alfa Pendular 4000 photos
Photos © their respective authors, shared on trainspo.com. They may show liveries or variants that differ from the specifications above.
More electric multiple units from Siemens

Siemens
ICE T (7 cars)
Electric multiple unit
1999 · 230 km/h

Siemens
ICE T (5 cars)
Electric multiple unit
1999 · 230 km/h

Siemens
UME 3400
Electric multiple unit
2002 · 140 km/h

Siemens
Br 424
Electric multiple unit
1999–2000

Siemens
BTS Siemens
Electric multiple unit
1999

Siemens
CP 2400
Electric multiple unit
1998 · 120 km/h

Siemens
SD-460
Electric multiple unit
1999–2005

Siemens
CPTM 3000
Electric multiple unit
2000
Similar electric multiple units from other manufacturers

CRRC Changchun Railway Vehicles
DDJ1
Electric multiple unit
1999 · 223 km/h

Alstom
RENFE 120
Electric multiple unit
2001–2004 · 250 km/h

Fiat
Sm3
Electric multiple unit
1995–2006 · 220 km/h

Alstom
RENFE 120.05
Electric multiple unit
2005–2009 · 250 km/h

Alstom
RENFE 104
Electric multiple unit
2003 · 250 km/h

Alstom
CP 3500 PT
Electric multiple unit
1999–2000 · 140 km/h

Alstom
ETR 490
Electric multiple unit
1998–1999 · 220 km/h

Hyundai Rotem
KRRI TTX
Electric multiple unit
2007 · 200 km/h