1982 Coupe DeVille
Powered by the new HT-4100 Digital Fuel Injection V-8 with automatic overdrive transmission, DeVille's dash contained a new standard Fuel Data Panel to help determine the most fuel-efficient route. Pushbuttons could display outside temperature or average trip MPG, or amount of fuel used. This year's new grille was made up of thin vertical bars, sectioned by two horizontal bars. The wide upper horizontal header, finished in brushed chrome and running full width, held the customary Cadillac script. Quad rectangular headlamps stood directly above rectangular amber-lensed parking/signal lamps. Cornering lamps with clear and amber lenses wrapped around the fender sides. DeVilles displayed a wreath and crest stand-up hood ornament.
1982 Coupe DeVille
Standard interiors used Heather knit cloth with matching Dundee ribbed cloth inserts, in five colors. Leather in the ribbed seating areas was optional, in choice of eight shades. A Cabriolet roof with bright crossover roof molding was available for the Coupe DeVille. DeVille d'Elegance had pillow-style seats in Venetian velour cloth, in four colors; plus opera lamps and accent striping. Sedan versions added three roof-mounted passenger assist straps. D'Elegance editions were identified by script on the roof sail panels.
| Model | Series Number | Body/Style Number | Body Type | Seating | Factory Price | Shipping Weight | Production Total |
| DeVille (V6 / V8) | 6C | D47 | 2-dr Coupe | 6 | $15,084 / 15,249 | 3783 lb | 50,130 (total includes the 2-door Fleetwood Brougham) |
| DeVille (V6 / V8) | 6C | D69 | 4-dr Sedan | 6 | $15,534 / 15,699 | 3839 lb | 86,020 (total included the 4-door Fleetwood Brougham) |
Figures before the slash are for V-6 engine, which was actually a $165 credit option; after slash for standard gasoline V-8. Diesel V-8 was also available.
| Feature | Base Engine | Optional #1 | Optional #2 |
| Type | 90-degree, overhead valve V-8 | 90-degree, overhead-valve V-6 | 90-degree, overhead valve V-8 |
| Block | Aluminum block w/cast iron liners | Cast iron block | Cast iron block |
| Head | cast iron head | Cast iron head | Cast iron head |
| Displacement | 249 cu. in. (4.1 liters) | 252 cu. in. (4.1 liters) | 350 cu. in. (5.7 liters) |
| Bore & stroke | 3.465 x 3.307 in. | 3.9565 x 3.40 in. | 4.057 x 3.345 in. |
| Compression ratio | 8.5:1 | 8.0:1 | 21.6:1. |
| Brake horsepower | 125 at 4200 R.P.M. | 125 at 4000 R.P.M. | 105 at 3200 R.P.M. |
| Torque | 190 lbs.- ft. at 2000 R.P.M. | 205 lbs.-ft. at 2000 R.P.M. | 200 lbs.-ft. at 1600 R.P.M. |
| Main bearings | Five | Four | Five |
| Valve lifters | Hydraulic | Hydraulic | Hydraulic |
| Fuel supply | Digital fuel injection | 4-bbl. | Fuel Injection |
| Manufacturer | Cadillac HT-4100 | Buick | Oldsmobile |
| VIN Code | 8 | 4 | N |
| Feature | Coupe | Sedan |
| Wheelbase | 121.4 in. | |
| Overall length | 221.0 in. | |
| Height | 54.6 in. | 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 | |
| Feature | DeVille Diesel | DeVille Gasoline |
| Transmission | Three-speed Turbo Hydra-matic (THM350C) | Four-speed overdrive automatic THM200-4R |
| Gear Ratio | (1st) 2.52:1; (2nd) 1.52:1; (3rd) 1.00:1; (Rev) 1.94:1. | (1st) 2.74:1; (2nd) 1.57:1; (3rd) 1.00:1; (4th) 0.667:1; (Rev) 2.07:1. |
| Clutch | All automatics except limo had torque converter clutch. | |
| Standard final drive ratio | 2.93:1 | 3.42:1 |
| Steering | recirculating ball; power assist | |
| Front suspension | coil springs and link stabilizer bar | |
| Rear suspension | four-link, coil springs, elect. level control available on DeVille | |
| Brakes | front disc, rear drum | |
| Fuel tank | 26 gal | 24.5 gal. |
1981