Only 5,545 were built in order to homologate the car for ' Group A ' Touring Car racing .
Only 5,545 were were based on the three - door Sierra bodyshell but fitted with a 2.0 - litre turbocharged engine of now legendary repute .
Only 5,545 were built in order to homologate the car for ' Group A ' Touring Car racing and were based on the three - door Sierra bodyshell but fitted with a 2.0 - litre turbocharged engine of now legendary repute .