Two Fleetwoods were available this year: The Fleetwood Brougham as a 2-door coupe and a 4-door sedan; and a Fleetwood Limousine as a 4-door sedan, 4-door formal limousine, and a commercial chassis.
Priced nearly $3000 higher, Brougham coupes and sedans looked similar to their DeVille brothers from the front, with the same new three-row grille made up of narrow vertical bars. Standard equipment included
Dual Comfort 55/45 front seats held three people and were trimmed in exclusive Fleetwood design, using Heather knit with Raphael cloth inserts. Eight colors of leather were also available. The coupe carried a distinctive Elk Grain vinyl Cabriolet roof with large quarter windows and electro-luminescent opera lamps. A chrome crossover molding highlighted its forward edge.
Sedans had a small (limousine-style) back window and full Elk Grain vinyl roof, with Cadillac's wreath-and-crest insignia on the rear roof (sail) panels. A Brougham nameplate stood at the back of rear fenders. Color-keyed vaned wheel covers were new. Optional: authentic wire wheels. Brougham d'Elegance offered tufted upholstery in cloth or leather, with 50/50 Dual Comfort seats, special trim and identifying scripts, and special wheel covers to match the body color.
| 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 |
| Model | Series Number | Body/Style Number | Body Type | Seating | Factory Price | Shipping Weight | Production Total |
| Fleetwood Brougham | 6C | B47 | 2-door Coupe | 6 | $17,931 / 18,096 | 3825 lb | 50,130 (total includes the 2-door DeVille) |
| Fleetwood Brougham | 6C | B69 | 4-door Sedan | 6 | $18,402 / 18,567 | 3866 lb | 86,020 (total included the 4-door DeVille) |
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 | Brougham Coupe | Brougham Sedan |
| Wheelbase | 121.4 in. | |
| Overall length | 221.0 in. | |
| Height | 54.6 in. | 56.7 in. |
| Width | 76.5 in. max. | |
| Front Tread | 61.7 in. | |
| Rear Tread | 60.7 in. | |
| Standard Tires | P215/75R15 SBR wide WSW | |
| Feature | Brougham Diesel | Brougham |
| Transmission | Three-speed Turbo Hydra-matic (THM350C) | Four-speed overdrive automatic (THM200-4R) |
| Ratios | (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 |
| Standard final drive ratio | 3.42:1 | 2.41:1 2.93:1 |
| Steering | recirculating ball; power assist | |
| Front suspension | coil springs and link stabilizer bar | |
| Rear suspension | four-link, coil springs, elect. level control std. on limo and available on Brougham | |
| Brakes | front disc, rear drum | |
| Fuel tank | 26 gal. | 24.5 gal. |
1981