The Ford Sierra is a mid-size car or large family car that was built by Ford Europe from 1982 to 1993. It was designed by Uwe Bahnsen, Robert Lutz and Patrick le Quément. The code used during development was "Project Toni" It was named for the Spanish word for mountain range.

The Ford Sierra was first unveiled on 22 September 1982 at the British International Motor Show hosted at the NEC in Birmingham. with sales beginning on 15 October 1982, replacing the Ford Cortina. Its aerodynamic styling was ahead of its time and as such, many conservative buyers (including company car drivers) did not take fondly to the Ford Cortina's replacement.

It was mainly manufactured in Germany, Belgium, and the United Kingdom, although Sierras were also assembled in Ireland, Argentina, Venezuela, South Africa and New Zealand.

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