Harry Yeaggy told the BBC he planned to take the vehicle first made famous by Sean Connery in Goldfinger out for a spin around London that night. "We're going to have a bit of fun with it," he said.
His winning bid at the RM Auctions sale in Battersea came in under the estimated £3 million. "I thought a European would get it," Yeaggy said, "but I guess they don't appreciate James Bond like we do."
He plans to display the car at his private museum in Ohio.
The vehicle as depicted in the Bond movies has revolving licence plates, Browning machine-guns, an ejector seat, a bullet-proof rear windshield and an early version of today's satellite navigation system.
It was previously owned by Jerry Lee, a U.S. broadcasting executive who paid $12,000 US for it in 1969. The proceeds of the sale will go to his charitable foundation that supports education and international anti-crime projects.
Bond's creator, novelist Ian Fleming, had originally placed Bond in a Bentley, but the filmmakers preferred the Aston Martin, which at the time competed with the Jaguar E-type for the lucrative British and American sports car market.
James Bond Real Film Car 1964 Aston Martin DB5 Video