"Cadillac V8" refers to a series of V8 engines that have been produced by the Cadillac division of General Motors since 1914. The first Cadillac V8 was the Type 51, which was the first mass-produced V8 engine in the world. It had a side-valve configuration and 70 hp, while the latest experimental 500-series engines can reach 400 hp. Over the years, Cadillac developed various engines of this type with different displacements, valve arrangements, and power outputs. The Cadillac V8 engines have been known for their innovation, performance, and luxury, and have been used in some of the most iconic Cadillac models.