Kenya Railways and UK-based power and propulsion systems group Rolls-Royce have announced that three of the former’s heavy haulage locomotives have been re-engined with the latter’s mtu Series 4000 engines. The locomotives were 40 years old and had actually been retired from service, so the refit has rejuvenated them and brought them back into service.

All mtu engines are produced by Germany-based Rolls-Royce Power Systems. The operation was undertaken by Rolls-Royce Solutions Africa, which has a branch in Kenya but is headquartered in South Africa. The project was carried out in collaboration with Malaysia-based rail engineering services group SMH Rail.

“With the implementation of the African Continental Free Trade Area (AfCFTA), we are experiencing an increase in cross-border trade,” explains Kenya Railways MD Philip Mainga. “By reviving this fleet, we are confident in our ability to meet the rising demand effectively, affordably and sustainably, contributing to the growth of our East African economy.”

The mtu Series 4000 engines are, Rolls-Royce states, the current “pinnacle” of the group’s high-performance, low-emissions, power systems technology. They are reliable, durable and fuel efficient. They are designed to operate both under demanding freight transport conditions and to be cleaner, more sustainable and more efficient than previous engines. In fact, they will deliver greater power and allow the locomotives to haul heavier loads across challenging terrain, and do so more economically, both in terms of fuel and oil use.

“We are honoured to partner with SMH and Kenya Railways on this important, first-of-a-kind project that has already proven successful,” highlights Rolls-Royce Power Systems Mobile & Sustainable Business unit president Andreas Görtz. “By integrating our advanced mtu Series 4000 engines into these locomotives, we contribute to a more sustainable and efficient rail transport system in Kenya. This partnership is an excellent example of our commitment to innovation, sustainability, and providing solutions that meet the specific needs of our customers.”

Kenya is moving towards decarbonising its transport sector through initiatives to produce non-fossil fuels, including biofuels and hydrotreated vegetable oil (HVO) fuels. The mtu Series 4000 engines – indeed, all new mtu-brand diesel engines – have been proven to operate normally using 100% HVO and other non-fossil liquid fuels.

Kenya Railways has not identified the class or the original manufacturer of the upgraded locomotives.