For 1958, Cadillac stood more or less pat on a winning hand. Styling
changes involved minor sheetmetal reshaping and ornamentation shuffling,
and all models acquired the new four-headlamp system, first seen at
Cadillac on the Brougham, in line with an industry trend. Eldorado
performance was substantially improved with the adoption of three
two-barrel carburetors, which boosted output to 335 bhp, 25 bhp up on the
single-four-barrel engine used where in the line. The Brougham's
astronomical price was unchanged, but the Seville 40 and Biarritz, which
consistently bore identical price tags, rose a startling $762. The timing of
such a substantial increase proved to be ill-advised in this deep recession
year and sales fell by more than half. The Brougham fared little better,
production stopping at a mere 304 units.
The major change for the Eldorado Brougham was seen inside the car. The interior upper door panels were now
finished in leather instead of the metal finish used in 1957. New wheel covers also appeared. Forty-four trim
combinations were available, along with fifteen special monotone paint colors. This was the last year for
domestic production of the handbuilt Brougham at Cadillac's Detroit factory, as future manufacturing of the
special bodies was to be done by Pininfarina of Turin, Italy.
Five special Eldorado Biarritz convertibles were built with completely automatic top riser mechanisms and metal
tonneaus and incorporated humidity sensors which activated the top riser mechanism in case of rain. These cars
had four place bucket seating and custom leather interior trims including driveshaft tunnel coverings. The 1958
Eldorado Brougham is a certified Milestone Car.