Wherrett Sigma
In 1981, Mitsubishi Australia produced a limited edition "Peter Wherrett Special" GH Series Sigma sedan. Only 500 cars were produced, which were commissioned after Wherrett complained about the GH Sigma's handling and was challenged to design a better car by the Mitsubishi Chief Engineer.[3]
also something else you may not know about Peter Wherett.
Wherrett also wrote a memoir entitled "Desirelines" with his brother Richard, who died in 2001.[4] In the book he revealed that he is a heterosexual cross-dresser.

Source: Wiki
Peter Wherett