Cadillac Model Thirty


The Cadillac Model Thirty is an automobile that was introduced in December 1909 by Cadillac, and sold through 1911. It was the company's only model for those years and was based on the 1907 Model G. The 1912 Model 1912, 1913 Model 1913, and 1914 Model 1914 were similar but used larger engines.

Engine and bodies

The 1910 model was available with a closed body, the first time a US automobile manufacturer had offered this type.
The engine was the same 226.2 in³ four-cylinder L-head design used in the Model G, and that car's simple sliding-gear transmission was also adopted. The engine was bored out to 255.4 in³ for 1910 and 286.3 in³ for 1911 and 1912. The engine was reworked, with a longer stroke, for 1913, giving 365.8 in³ of displacement. This same engine served in 1914.

Self starter

The 1912 model was awarded the Dewar Trophy for its electrical system, including its electric starter.

Type 51 and the V8 engine

The entire range was extensively revamped and given a V8 engine for 1915 and renamed Type 51