The Rovin D4 represented a mild evolution from the D3, with a larger front grille and the (still not integrated) headlights positioned a little higher.
The two cylinder engine was elarged to 462 cc and now developed 13 hp. By now the overall length was 3150 mm on a wheelbase of 1800 mm. The gear box now featured four forward speeds and the top speed had increased to 85 km/h (53 mph). Minor cosmetic changes and suspension improvements were implemented towards the end of 1952.
About 1,200 D4s were produced between 1950 and 1953, but in 1953 production had slumped to just 110. Although the model continued to be listed for several more years it is not clear how many, if any, were produced after this.
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