The Saracen PRH 20 is a Formula Ford 1600 with a clean-sheet chassis design and all new bodywork. The cars were also known at the time as one of a Saracen 77F to 80F depending on the year of manufacture.

This was the first car developed under the Saracen marque after the Elden marque had been acquired by Frank Bradley (who later went on to found Swift Cooper).