The Entrop was a Dutch automobile manufactured by a cycle company^[which?] in 's Gravenmoer in 1909. The firm produced over 1500 bicycles, but only four cars.

The car was powered by an air-cooled engine mounted behind the single front wheel. It weighed 400 kg (880 lb), and used lever steering. There were two engines available: a single-cylinder 417 cc engine, and a two-cylinder 813 cc engine.^[1]

• Burgess-Wise, David (2000). The New Illustrated Encyclopedia of Automobiles (May 2000 Rev. Upd. ed.). BookSales Inc. ISBN 0-7858-1106-0.^{[page needed]}