At first, a larger capacity 149-cubic-inch (2,440 cc) engine was only sold attached to a three-speed manual gearbox or the Hydramatic four-stage automatic transmission with a column shift.

The Controlled Coupling Hydramatic used in the EH was actually a four-stage, although it effectively worked as a three-speed unit, except at full throttle.

"Standard" models were basic, with no side badging, and were mostly fitted with 149-cubic-inch engines, rubber floor mats and single-tone acrylic paint finish.

The "Premier" was the top of the range model, with a 179-cubic-inch engine and Hydramatic transmission, leather interior, bucket seats, fold-down centre armrest in the back seat, carpets, metallic paint, a centre console incorporating a heater/demister, a handbrake warning light, a boot light (in sedan models) and chrome-plated wheel trims.

The S4 Special was introduced in September 1963 for racing homologation purposes - a minimum of 100 were required to be built & sold.