Ruf Automobile GmbH (stylized as RUF) is a German car manufacturer. Formerly using Porsche bodies in white to build cars, today they build vehicles on their own bodies and chassis. They also manufacture performance parts for various Porsche models, including the 911, Boxster, and Cayman.

The company rose to fame when in 1987, its Porsche-derived CTR reached 211 mph, surpassing the Ferrari F40's previous top speed record of 201 mph. In 2017, Ruf unveiled a modern revival of the classic CTR "Yellow Bird" with a claimed top speed of 225 mph.