Automatic transmission
From March 1965, the Admiral could also be ordered with the Chevrolet-sourced 4,638 cc V8 which had been fitted as standard since August 1964 in the Opel Diplomat. The V8 engine was fitted only in conjunction with GM's Powerglide Automatic transmission. From September 1967, the same Powerglide transmission was available as an option, on the six cylinder powered cars.