Nigel Roger Williams, 44, from Torquay, Devon, was photographed speeding in his MG ZR car on the A3022 in November 2007 by a Devon and Cornwall Safety Camera Partnership van.
He denied it was his car, later supplying photographs of his car which showed number plate differences and a silver rear windscreen wiper attachment.
But a police investigation revealed he purchased the new plate in Worcestershire after the offence. He was then arrested.
Judge Francis Gilbert at Plymouth Crown Court described Williams, who admitted perverting the course of justice, as a “thoroughly dishonest person”.
Williams was sentenced to eight months, suspended for two years.
He was also fined £1,000 and ordered to wear an electronic tag.

Jon Cherry is a Director of leading personalised number plate dealer Regplates.com. Jon has over 25 years industry experience handling some of the most expensive plates ever sold with many high profile and celebrity clients. Active since 1991 in the number plate industry, Jon is currently Chairman of the Cherished Numbers Guild, a trade body representing number plate dealers in the UK. Jon has written many articles on the industry and insight into the future of numberplates and the market as a whole.