Deville Cadillac History 1984

Deville Cadillac Moels & History 1984

New front-drive versions of DeVille and Fleetwood were anticipated, but delayed because of quality control questions; so for 1984 the rear-drive coupe and sedan carried on. Bodyside moldings were now color-keyed to the body finish. Taillamp lenses held goldtone Cadillac wing crests. All models now had electronic level control. The standard fuel-injected 249 cu. in. (4.1-liter) V-8 engine fed into a revised exhaust system with monolithic catalytic converter.

Electronic controls were modified to meet stricter emissions standards in high-altitude regions. The diesel V-8 remained on the option list, except in California because of its emissions Model regulations. Standard equipment included

  • power brakes and steering,
  • whitewall steel-belted radials,
  • electronic level control,
  • automatic climate-control air conditioning,
  • signal-seeking stereo radio with power antenna,
  • cornering lights,
  • light monitors
  • power windows
  • six-way power seat,
  • tinted glass,
  • a remote-control left outside mirror,
  • right visor mirror,
  • automatic parking brake release,
  • P215/75R15 tires
  • a stowaway spare.

The front-wheel drive editions appeared during the ’84 model year as early 1985s.


Model Series Number Body/Style Number Body Type Seating Factory Price Shipping Weight Production Total
DeVille (V-8) 6C M47 2-dr Coupe 6 $17,140 3935 lb 50,840 (total includes the 2-door Fleetwood Brougham)
DeVille (V-8) 6C M69 4-dr Sedan 6 P $17,625 3993 lb 107,920 (total included the 4-door Fleetwood Brougham)


Feature Standard Engine Optional Engine
Fuel Gasoline Diesel
Type 90-degree, overhead-valve V-8. Iron/aluminum alloy block; cast iron head. 90-degree, overhead valve V-8. Cast iron block and head.
Displacement 249 cu. in. (4.1 liters). 350 cu. in. (5.7 liters)
Bore & stroke 3.47 x 3.31 in. 4.05 x 3.38 in.
Compression ratio 8.5:1 22.7:1
Brake horsepower 135 at 4400 R.P.M. 105 at 3200 R.P.M.
Torque 200 lbs.-ft. at 2200 R.P.M. 200 lbs.-ft. at 1600 R.P.M.
Main bearings Five Five
Valve lifters Hydraulic Hydraulic
Fuel supply Digital fuel injection (single-point, dual injectors) Fuel injection
Manufacturer Cadillac Oldsmobile
VIN Code B N


Wheelbase 121.4 in.
Overall length 221.0 in.
Height (coupe) 54.6 in.
Height (sedan) 55.5 in.
Width 75.3-76.4 in.
Front Tread 61.7 in.
Rear Tread 60.7 in.
Standard Tires P215/75R15 SBR WSW


Transmission Four-speed overdrive automatic
Gear ratios (1st) 2.74:1; (2nd) 1.57: 1; (3rd) 1.00:1; (4th) 0.67:1; (Rev) 2.07:1
Standard final drive ratio 3.42:1 except w/diesel, 2.93:1
Steering power recirculating ball
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 24.5 gal. except with diesel, 26.0 gal.


5.7-liter diesel V 8 engine NC
California emission equipment $99
Engine block heater $18-$45
Heavy-duty battery $40
100-amp Alternator $50
Heavy-duty ride package $319


DeVille d’Elegance $1150
Cabriolet roof coupe: $420


Astroroof $1225
Electronic cruise control $185
Controlled-cycle wiper system $60
Rear defogger w/heated outside mirrors $165-$215
Automatic door locks $162
Remote-locking fuel filler door $59
Garage door opener (except convertible) $140
Illuminated entry system $76
Dual comfort front seats $225
Memory driver’s seat $205
Six-way passenger seat $215-$225
Power driver’s seat recliner $115
Power passenger seat recliner $155
Power passenger seat recliner w/six-way power seat $315-$380
Leather-trimmed steering wheel $99
Tilt/telescope steering wheel $184
Power trunk lid release and pull-down $120
Theft deterrent system $190
Twilight Sentinel $79
Guidematic headlamp control $93
Opera lamps $88
Trumpet horn $38
Electric remote-control outside mirrors $101
Twin lighted vanity mirrors $140
Electronic-tuning seek/scan AM/FM stereo radio with clock and cassette player $229
Electronic-tuning seek/scan AM/FM stereo radio with cassette and CB $577
Triband antenna $50
Full padded vinyl roof $285
Two-tone paint $345
Two-tone paint (Firemist) $465
Firemist paint $235
Accent striping $77
Door edge guards $19-$29
License frames, each $14
Leather seating area $515-$680
Carpeted Front rubber floor mats $43- $45
Carpeted Rear rubber floor mats $25
Trunk mat $21
Locking wire wheels $860
Turbine vaned wheel covers $77
Locking wire wheel covers $315- $394
Puncture-sealing tires $135-$180