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When the MGA arrived in 1955, it must have come as quite a shock to MG aficionados who had become used to the pre-war look of the company's sports cars. Even the revamped TF left nothing to doubt about its 1930's-style design. The MGA was a complete departure in styling for MG. Its beautiful streamlined body was right up to the minute in terms of appearance, and it was powered by a new engine, as MG had decided that the old XPAG unit had had its day. The MGA was powered by the much more modern B-series engine that had made its debut in the recently announced Magnette saloon.

MG enthusiasts had been given a hint of what was to come as early as 1951 when George Phillips drove a re-bodied TD Midget in the Le-Mans 24 hour endurance race. The car had been built for him by MG following his successes with his own TC, which had been fitted with a lightweight two-seat race car style body. So different was the appearance of his new TD racer, that it must have been difficult to believe that it was actually a venerable TD Midget underneath! It was a road-going version of the Phillips car which had been proposed to BMC in 1952 as a replacement for the TD Midget, but which had been turned down because of the corporation's decision to build the Austin-Healey 100. MG had gone as far as building a full prototype of the MGA by using TD running gear, the 1250 XPAG engine, a re-designed chassis, and the MGA bodywork.

When it eventually became clear that the TF Midget was a bit of a lame duck and that it would have to be replaced, the new MG sports car was finally given the chance it deserved. The delay in production had one advantage in that it allowed MG to refine the design and install the much newer 1489cc four cylinder B-series engine and its transmission from the Magnette saloon.

Before the official launch of the MGA in 1955, three aluminium bodied prototypes of the new sports car, coded EX182, were entered into Le Mans. Fortunately for MG, they acquitted themselves well, finishing fifth and sixth in their class. Thus, when the MGA was finally announced shortly after this, the car already had a competition background as testimony to its pedigree. No doubt this did much to ensure its acceptance by enthusiasts who were reluctant to say goodbye to the old fashioned traditional looks of the MG.

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