Eldorado Cadillac History 1956

Eldorado Cadillac Models & History 1956

1956 Cadillac Eldorado

The1956 Cadillac line offered buyers a choice of Eldorados for the first time. The convertible returned with the name Biarritz (body style series #6267SX) to set it apart from a new two-door hardtop companion called Seville (body style series #6237DX). Both names were taken from historic—and, of course, prestigious—European cities, Seville in Spain and Biarritz in France. Styling changes common to both included the addition of a smart, twin-bladed hood ornament—suitable for impaling unsuspecting pedestrians—and a pair of ribbed chrome “saddles” on the door tops.

1956 Cadillac Eldorado

An Eldorado script appeared, with a fender crest, on the luxury convertible, which also featured a twin-fin hood ornament. Other extras on this car—now known as the Biarritz—were a ribbed chrome saddle molding extending from the windshield to the rear window pillar along the beltline and flat, pointed rear fender fins. The Eldorado represented an especially luxurious hardtop coupe, which was built to Eldorado standards and similarly priced. Both cars in the Eldorado sub-series were slightly longer this year.

The Seville proved to be particularly popular, outselling the Biarritz by nearly 2 to 1 (3900 to 2150). Interestingly enough, their positions would be reversed within three years. Under the hood, the Cadillac V-8 was enlarged for the first time since 1949, with a 4.8mm increase in bore (101.6mm) and the same 92.1mm stroke bringing swept volume to 5.972 Liter. Compression was 9.75:1. Horsepower was rated at 305 @ 4700 rpm for the two Eldorados, again 20 more than that of other models. The engine had two carburetors (rather than one for other models): Carter WCFB four-barrel Model 2371S.

1956 Cadillac Eldorado

The Eldorado Seville two-door hardtop was introduced to the public almost a month earlier (October 24, 1955) than other models which were introduced on November 18. The 1956 Hydra-Matic transmission incorporated changes that increased its size and smoothed out shifting qualities. It was developed by GM at a cost of $35 million.


1956 Cadillac Coupe DeVille

  • Serial numbers and engine numbers were the same again and were found in the same locations.
  • The first two symbols were “56” to designate 1956 model production.
  • The next two symbols indicated the series as follows:
    • “62” = Series 62
    • “60” = Fleetwood Sixty
    • “75” = Fleetwood 75
  • The remaining digits represented the consecutive unit number and began at 00000 for each series.
  • All series had the same ending number, which would be misinterpreted if listed.


Model Number Body Style Doors Model Seat Price Weight Production Total
55-62 6237DX Coupe Seville 6 $6501 2120 kg 3900
55-62 6267SX Convertible Biarritz 6 $6501 2218 kg 2150

NOTE: The symbol X after Body Style Number indicates hydraulic window lifts were a standard feature.


Feature Standard Engine Optional Engine
Type V-8: Overhead valves V-8: Overhead valves
Block Cast iron block Cast iron block
Displacement 5.972 Liters 5.972 Liters
Bore and stroke 101.6mm x 92.1mm 101.6mm x 92.1mm
Compression ratio 9.75:1 9.75:1
Horsepower rating 285 hp @ 4600 rpm 305 hp @ 4700 rpm
Power rating 213 kW @ 4600 rpm 227 kW @ 4700 rpm
Main bearings Five Five
Valve lifters Hydraulic Hydraulic
Carburetor Carter WCFB four-barrel, Model 2370S Two (2) Carter WCFB four-barrel, Model 2371S


Feature Series 62 Eldorado
Wheelbase 3277mm
Overall Length 5644mm
Front Tread 1524mm
Rear Tread 1603mm
Tires 8.20 x 15 whitewall
Exhaust Dual exhaust


Air conditioning.
White sidewall tires.
E-Z-Eye safety glass.
Autronic eye automatic headlamp dimmer.
Signal-seeking radio with preselector and antenna.
Heating and ventilation system.
Power window lifts (specific models).
Gold finish grille.
Six-way power seat std