Skip to main content


  • New and retrofit applications catered for current and new rolling stock.
  • Improvements to performance and reliability through tailored products to meet the specific requirements of the industry.
  • Reduced thermal loading resulting in improved engine and turbocharger reliability
  • Environmental benefits from exhaust emissions and smoke reduction through cleaner combustion.
  • Reduced through life costs from lower part count.
Wabtec is one of the biggest providers of equipment to rail market in the world.

Napier has a long history of operating within the world rail business and this combined with being a part of the Wabtec group of companies, Napier has a wealth of experience to draw on from a world-leading rail-focused company. Many of the features demanded by our other customers are relevant within the rail industry and the experiences and technology can be transferred.

For installations where the support for your current products has been reduced Napier can work with your engineers to develop either a more supportable retrofit product or where possible provide upgrades to meet improvements in efficiencies and reductions in harmful emissions both gaseous and particulate.

Which turbocharger is right for you?

Our full range of turbochargers is used across the Rail industry, except for the two-stage models.


Power generation using Napier Turbochargers

To supply the air to the cylinders of an engine there are two possibilities, one naturally aspiration or forced induction. The forced induction forces more air into the cylinders allowing a significant improvement in the power-to-weight ratio for the engine. A turbocharger can be employed to force more air into the engine. A turbocharger employs a centrifugal compressor connected to a turbine wheel on a common shaft. The compressor is driven via the turbine wheel using part of the energy contained within the exhaust gases to compress the air into the cylinders.

The chart shows a typical performance increase for an engine fitted with a turbocharger.

Turbocharger graph red blue

Know your turbochargers

We design and manufacturer turbochargers for many different applications, from the small TNX range to the huge and powerful two-stage products. The table below provides specifications for turbochargers from across our range, including Power Range (KW), Engine Speed and Fuel Type.

How can we help with your project?

Whether you need our turbochargers or just our expertise, we're always happy to chat about your requirements.

We'll talk you through the services and support we can provide, and which of our products may be best suited to your needs.

Simply fill out the form with your details and we'll be in touch very soon.

Contact us

Not what you were looking for?