Ken Annakin did not like working with Tony Curtis, calling him "brittle, self-centered and a bully".
This followup to Those Magnificent Men in Their Flying Machines or How I Flew from London to Paris in 25 Hours 11 Minutes (1965) had the same director, writers, composer, and five actors. Terry-Thomas played the son of his character in the earlier movie, and Eric Sykes' character was again an employee of Terry-Thomas'. Gert Fröbe, William Rushton, and Michael Trubshawe played unrelated roles.
The name Sir Percy Ware-Armitage is a reference to male genitalia and Armitage-Ware (now Armitage Shanks), a company that produced porcelain bathroom products, including urinals.
Only received its first DVD release in 2008.
Tony Curtis had appeared in an equally star-laden film about a similar subject, The Great Race (1965), four years earlier.