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
London to Brighton Veteran Car Run Challenge, following the same route as the veteran car run, but starting in Brighton and finishing at Regent Street, London – and taking place of the day prior to the veteran run. The event is intended to showcase low energy impact vehicles of various technologies – Electric, Hybrid and Low-Emission ICE (Internal Combustion Engine). Participants compete to minimise energy consumption using "road legal" vehicles in "real world" conditions. The results of the inaugural 2010 event showed that the electric vehicles used the least energy (0.62 MJ/km on average, or 141 miles per imperial gallon petrol equivalent), compared to the hybrid