Percy Pierre Gustaf "Peter" Janson (born 10 April 1940 in New Zealand) is an Australian socialite and former motor racing driver.

Janson is renowned for the parties he throws, and was a pioneer in transforming the Melbourne Cup into a major event on the Australian social calendar.

He later scored a class win and fourth outright driving a BMW M3 with fellow Kiwi Trevor Crowe at the 1988 Bathurst 1000.

[6] Janson's last appearance at Bathurst was in 1992 where he and Bob Jones finished 20th in a Holden VL Commodore SS Group A SV.

[7] His former co-driver Larry Perkins also told that one year on a parade lap at Bathurst, Janson continually pulled the car off onto the grass in order to throw Cherry Ripe chocolate bars out to the crowd (his major sponsor being Cadbury Schweppes).