For both years, the standard Supreme engine was Oldsmobile's 330 cubic-inch "Ultra High Compression" Jetfire Rocket V8 rated at 320 hp (239 kW) with a four-barrel carburetor with transmission offerings including a standard three-speed manual with column shift, floor-mounted four-speed manual with Hurst shifter or a two-speed Jetaway automatic.
In 1967, the high-performance 442package with the 400 cubic-inch 350 horsepower (260 kW) V8 was available on three Cutlass Supreme models including the sport coupe, Holiday coupe and convertible. Also available on each of those three Supreme two-door models was "Turnpike Cruiser" option that included a more economical 400 cubic-inch V8 with two-barrel carburetor and 300 hp (220 kW) rating along with a numerically lower rear axle and Turbo Hydramatic transmission. The Turnpike Cruiser option package was designed for high-speed highway cruising.