Dorothy Conyers Nelson Champney became Dorothy Riley (7 March 1909 – 22 July 1968) was a British rally driver who drove the fastest car by a woman in the 1934 Le Mans 24 hour race partnered by Kay Petre.

Her parents were Gerthrude (born Wilcox) and Colonel Frederick D'Arcy Champney who[1][2] was of "independent means".

Champney beat Jackie Astbury in a Singer and Marjorie Smith in a Alvis.

[2] In 1934 she who drove the fastest car by a woman in the 1934 Le Mans 24 hour race.

Champney died in Moreton-in-Marsh in 1968 having outlived her husband by just over ten years.