The Cadillac V16 engine was a type of automobile

Automobile

An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...

 engine produced in the 1930s. Cadillac produced two of only three production, gasoline-fueled V16 engine

V16 engine

A V16 engine is a V engine with 16 cylinders. Engines of this number of cylinders are uncommon in automotive use.A V16 engine is perfectly balanced regardless of the V angle without requiring counter-rotating balancing shafts which are necessary to balance Straight-4 and odd number of cylinder...

models in history. Both were used in the Cadillac V-16 automobile, the first from 1930 until 1937, and the second between 1938 and 1940. The company has twice attempted to build a new V16 engine, once in the 1980s and again in 2003

Cadillac Sixteen

The Cadillac Sixteen was a prototype of a stylish and high performance automobile first presented by Cadillac in 2003.The vehicle was equipped with a 32-valve V16 concept engine displacing 13.6 liters and was mated to a four-speed, electronically controlled, automatic transmission driving the rear...

, but these have yet to be put into production.

The only other 16-cylinder automotive engines ever attempted were Bugatti

Bugatti

Automobiles E. Bugatti was a French car manufacturer founded in 1909 in Molsheim, Alsace, as a manufacturer of high-performance automobiles by Italian-born Ettore Bugatti....

's 1915 U16

U16

U16 or U-16 may refer to:* U-16 or U16, an abbreviation of "under 16", a common designation for sports leagues or tournaments for players age 16 or younger* German submarine U-16, one of several German submarines...

, Marmon

Marmon

Marmon Motor Car Company was an automobile manufacturer founded by Howard Marmon and owned by Nordyke Marmon & Company of Indianapolis, Indiana, USA. It was established in 1902 and was merged and renamed in 1933. They produced cars under the Marmon brand. It was succeeded by Marmon-Herrington and...

's V16, and Cizeta-Moroder

Cizeta-Moroder V16T

The Cizeta-Moroder V16T, now known as just the Cizeta V16T, is an Italian sports car created by automotive engineer Claudio Zampolli in a joint venture with music composer Giorgio Moroder and designed by the famed Marcello Gandini. It was the only product of the Cizeta company...

's V16.