The new Hydra-Matic automatic transmission was introduced in
1956 Cadillacs. In addition, the V8 was bored out to 365
cubic inches and produced 285 horsepower in standard models
and 305 horsepower in the Eldorado. 2 new
body styles - Cadillac Series 62 Sedan DeVille four-door
hardtop and the Eldorado Seville two-door hardtop helped
Cadillac sales to soar to 154,631 cars, 10 percent than
the previous model year.