History of the diesel car developments (Mercedes-Benz, BMW, Peugeot/Citroën, Fiat, Alfa Romeo, Volkswagen Group) There were also small diesel engines produced in England by British Leyland and Perkins. For reasons of economy the petrol BMC "B" series engine was dieselised and produced in capacities of 1.5 and 1.8 litres. Perkins produced the 4.99, 4.107 and 4.108 engines all of which were extremely reliable. Later BL produced the five main bearing "O" series engine which was extremely strong. Petrol turbo variants could make 200HP and the engine was ideal for converting to a diesel. In fact, the 1988 Austin-Rover MDi unit (also known as the 'Perkins
Diesel multiple unit In 2018 the first bi and tri-mode electro-diesel multiple units were introduced: Canada generally follows similar buffer strength requirements to the USA, but new services are evaluated on a case-by-case basis. As a result, several types of lightweight DMUs have been used: Costa Rica has purchased several Apolo 2400 series DMU railcars from the former narrow gauge operator in Spain, which are run in commuter service. A type of diesel multiple units in the U.S. was the Budd Rail Diesel Car (RDC). The RDC was a single passenger car with two diesel engines and two sets of controls. In the