The mtu powerhouse of the 956 series is in use in Vienna, Austria. It is one of the six emergency power units that are on standby to continue supplying the subway with electricity in the event of a failure of the public grid.

Rolls Royce Group

The critical emergency power infrastructure for Vienna’s subway system, using MTU Powerhouse engines from the 956 series. These emergency power units ensure that the subway system continues to operate safely even during a power failure.

MTU is known for its powerful diesel engines and is a brand within the Rolls-Royce Group. They produce engines for a variety of applications including ships, heavy land vehicles, and industrial use. The 956 series, as mentioned, seems to be involved in providing emergency backup power to the Vienna subway system.


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The importance of such systems cannot be overstated. In mass transit systems like subways, a sudden loss of power can lead to significant safety concerns. With these emergency power units in place, Vienna ensures that its subway system remains operational, allowing for safe evacuation and continuous provision of critical services like lighting, escalator operation, and control systems even during a power outage.


The Vienna subway is one of the most modern and efficient subway systems in the world. The emergency power units are an important part of what makes the system so reliable.

Here are some additional details about the MTU powerhouses:

  • They are manufactured by MTU Friedrichshafen, a German company specializes in the production of diesel engines and other power systems.
  • The powerhouses are equipped with a variety of safety features, including fire suppression systems and automatic shutdown mechanisms.
  • They are regularly inspected and maintained to ensure that they are in good working order.


However, if you’re asking for the specific locations of these units in Vienna, that information might not be publicly disclosed due to security reasons. To get precise locations or more detailed information about the installation, one would likely need to contact Vienna’s public transportation authority or the relevant city department.

Rolls Royce

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