FF ( Ferguson Formula) Developments Limited (FFD) was a British company founded in 1971 by Major A.P.R. (Tony) Rolt to exploit 4WD technology, Rolt had previously worked as Technical Director for Harry Ferguson Research for many years.[1]

According to Ward's Auto World[2] the influence that FFD had on all wheel drive (AWD) development transcended its size.


The company was founded in Coventry in 1971 by Tony Rolt.[1] In 1981 Rolt's son, Stuart, joined the company as Marketing Director, becoming Chief Executive in 1986.[3]

In 1990 the company opened an engineering centre in Detroit.[3]

Following its sale to the automotive consultancy group Ricardo in 1994, the company was renamed FFD-Ricardo. Stuart Rolt remained the CEO until 1996.[3] Ricargo having also previously acquired Ferguson Research Ltd.



Transmission types
Continuously variable
Bicycle gearing
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