In 1970, the RNRII was a high technology car: The monocoque centre section is marine plywood to which steel space frames are attached at the front and rear. Some components were improved but the main difference came from the engine. Whereas the Astra RNR1 was fitted with the Ford Cosworth FVA engine, the RNR2 used the 1800 cc Ford Cosworth FVC engine.
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