Standard engine for DeVille and Fleetwood Brougham was the “modulated displacement” 368 cu. in. (6.0-liter) V8-6-4, with digital fuel injection. Optional: a 252 cu. in. (4.1-liter) V-6, provided by Buick. That V-6 had Computer Command Control and a knock sensor to adjust spark advance, as well as diagnostics. The Olds diesel V-8 was also offered.
Externally, DeVilles and Fleetwoods carried a new forward-peaked grille with heavy wide upper header bar (Cadillac script again at the side) over an undivided tight crosshatch pattern. Quad headlamps sat above quad amber parking/signal lamps, with wraparound clear/amber cornering lights. Standard wheel covers displayed a Cadillac crest on dark red background. New standard Electronic Climate Control offered digital accuracy. Standard equipment also included a six-way power passenger seat, power windows, and low-fuel warning. New pillow-style seating came in rich Heather cloth (four colors); or leather in ribbed seating areas (ten colors). Sedan DeVilles could have automatic lap-shoulder belt for driver and front passenger. Other options: a Heavy-Duty Ride package, wire wheel covers, and Elk Grain vinyl roof.
STYLE
Model Number
Style Number
Body Type
Seating
Factory Price
Shipping Weight
Production Total
6C
D47
2-door Coupe
6
$13,285 / 13,450
3801 / 4016 lb
62,724 (total includes the 2-door Fleetwood Brougham)
6C
D69
4-door Sedan
6
$13,682 / 13,847
3852 / 4067 lb
86,991 (total included the 4-door Fleetwood Brougham)
Figures before the slash are for V-6 engine, after slash for variable-displacement gas V8-6-4. A diesel V-8 was also available. By late spring 1981, prices rose on all reached $23,000 for the diesel, Coupe DeVille $14,345.
ENGINES
Feature
V-6
Diesel V-8
Type
90-degree, overhead valve V-6. Cast iron block and head
90-degree, overhead valve V-8. Cast iron block and head
Displacement
252 cu. in. (4.1 liters)
350 cu. in. (5.7 liters)
Bore & stroke
3.965 x 3.40 in.
4.057 x 3.385 in.
Compression ratio
8.0:1
22.5:1
Brake horsepower
125 @ 3800 rpm
105 @ 3200 rpm
Torque
210 lbs.-ft. @ 2000 rpm
200 lbs.-ft. @ 1600 rpm
Main Bearings
Four
Valve Lifters
Hydraulic
Fuel Supply
4-bbl. Carburetor
Made by
Buick
Oldsmobile
VIN Code
4
N
CHASSIS
Wheelbase
121.4 in.
Overall length
221.0 in.
Height
DeVille Coupe 54.6 in.; DeVille sedan 55.6 in.
Width
76.5 in. max.
Front Tread
61.7 in.
Rear Tread
60.7 in.
Standard Tires
P215/75R15 SBR wide WSW
DRIVETRAIN
Transmission
Turbo Hydra-matic transmission standard on all models; column shift.
