streamlined small car was introduced in 1936 by the Austrian manufacturer Steyr-Puch. The car had a water-cooled four-cylinder boxer engine driving the rear wheels through a four-speed transmission. It had a similar engine and radiator layout as the Fiat Topolino that was launched at about the same time. To save room and weight a dynastarter was used, which doubled as the axle of the radiator fan. It was regarded as the "Austrian Peoples' Car" and was affectionately referred to as the Steyr "Baby". Professor Porsche had, despite rumors, not been involved in the design or production of the 50. Moreover, the little Steyr offered better seating and luggage space than Porsche's Volkswagen with shorter overall length, a large sheet metal sliding roof and was available with hydraulic brakes (instead of the early Volkswagens' cable-operated ones). In early 1938, the car was revised. It got a more powerful engine and a longer wheelbase. The new model was called the Steyr 55 and went on sale in 1940. A total of 13,000 Steyr "Babies" were sold. The production of Steyr cars was discontinued during World War II, after bombing of the factory. After the war, the factory was rebuilt and specialized in Austrian versions of the Fiat 500 and Fiat 1500. Today the Steyr factory produces the BMW X models for Europe. The pre-war European car market was not one market. Trade barriers fragmented it into national markets, apart from luxury cars where the extra cost of tariffs could actually make cars more exclusive and desirable. The only way for a car maker to enter another national market of a major European car making country, (and their colonial markets of the time), was to open factories there. For example, Citroën and Renault opened factories in England in this period. This situation only changed with the post-war growth of the EEC (European Community) and EFTA. The British RAC (Royal Automobile Club) horsepower taxation system had the secondary function of excluding foreign vehicles. It was specifically targeted at the Ford Model T, which the then government feared would wipe out the fledgling indigenous motor industry. It crippled car engine design in Britain in the inter-war period, causing British car makers to produce under-square, low revving, long stroke engines. It was abolished after World War II as part of the British export drive for desperately needed, hard foreign currency, because it made British cars uncompetitive