Cadillac Models & History 1966

Following the general styling theme found on Calais models, the DeVille series was again distinguished with Tiffany-like scripts above the rear tip of the horizontal body rub moldings. Standard equipment additions followed the pattern of previous years. Cadillac crests and V-shaped moldings, front and rear, were identifiers.


Type V-8 Overhead valves
Block Cast iron block
Displacement 429 cubic inches
Bore and stroke 4.13 x 4.00 inches
Compression ratio 10.5:1
Brake horsepower 340 @ 4600 rpm
Bearings Five main bearings
Valve Lifters Hydraulic valve lifters
Carburetor Rochester four-barrel type, model 7026030



Model Number Style Number Body Type Seating Factory Price Shipping Weight Production Total
66-683 68369-L 4-door Sedan 6 5581 4535 11,860
66-683 68339-B 4-door Hardtop Sedan 6 5581 4515 60,550
66-683 68357-J 2-door Coupe DeVille 6 5339 4460 50,580
66-683 68367-F 2-door Convertible Coupe 6 5555 4445 19,200
Wheelbase 129.5 inches.
Overall length 224.2 inches.
Front tread 62.5 inches.
Rear tread 62.5 inches.
Automatic level control standard where indicated in text.
A new engine mounting system and patented quiet exhaust were used.
Tires 8.00 x 15.


Air conditioner $495.
Bucket seats with console in DeVille hardtop, Coupe, and Convertible models with leather upholstery $188.
Controlled differential $54.
Cruise Control $97.
Door guards on two-door models $4
Door guards on four-door models $7.
Soft Ray tinted glass $52.
Delete-option heater and defroster $97 credit.
Leather upholstery on all Devilles except the convertible models $141.
License plate frame $6.
Padded roof on Coupe DeVille model $124
Padded roof on DeVille sedan or hardtop models: $140.
The new seat warmer $60.20
Left-hand four-way power bucket seat on DeVille hardtop, Coupe, and Convertible models $54.
The recliner seat with head rest which was available only in DeVille hardtop, Coupe, and Convertible models with Eldorado bench seats or optional bucket seats. $64.20 extra
Power door locks on Coupe and Convertible models $46
Power door locks on four-door models: $70.
Power headlight control $51.
Six-way power front seat on all DeVille models: $85.
Head rests $40.15
Power vent window regulator option $73.
Radio with rear speaker $165.
Radio with rear speaker and remote control $246.
AM/FM radio $191.
Rear seat belts $18.
Front seat belt delete-option $17 credit.
Adjustable steering wheel $91.
Remote control trunk lock $53.
Twilight Sentinel $57.
Five white sidewall tires 9.00 x 15 size with four-ply construction $57 exchange.