The first car produced by Arnolt was the Arnolt-MG, a four-seater Bertone-bodied car based on the MG TD chassis and XPAG 54hp engine that was built between 1953 and 1954.

The Arnolt MG was designed by Giovanni Bertone, his son Nuccio, and Giovanni Michelotti. Of a planned production of 200 cars, 103 have been documented as built between 1953 and 1954 (67 coupes and 36 convertibles). Out of this total, the whereabouts of 36 are unknown and three are known to have been scrapped (as of 1993).

The initial price was $3145. In 1954, MG informed Arnolt that it could no longer supply chassis and engines due to demand for its own complete cars (as well as the replacement of the TD by the TF), so Arnolt began looking for a larger-engined car.