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
Bilevel rail car by diesel locomotives and include electric generators housed in the control car. In Iran, the Tehran-Hashtgerd suburban commuter line is served with electric push-pull hauled trainsets with double-decker carriages manufactured by Wagon Pars in Iran. In South Korea, ITX-Cheongchun, the express train of Korail uses double-decker. Because of the two levels being separate on most cars, there is a physical limitation on a single conductor, as it can be difficult for him or her to verify, collect payment and sell tickets to passengers on the two levels. In 1955, the St. Louis Car Company came up with a solution in