The car's a 1962 Jaguar XKE; the gent behind it is James Raisbeck, aerodynamicist and owner of the Jag that was used when Boeing was testing an internally blown trailing edge flap system on the prototype 707, 367-80, known as the "Dash 80" aircraft in 1963.
In order to test the response characteristics of an alpha/beta airflow sensor in an economical way, Raisbeck offered up his 1962 Jaguar XKE. After running up and down Boeing Field at speeds to 120 knots in 1963, the recorded data was fed into the computers aboard the DASH 80, when the same instrument was mounted on a nose boom 30 feet in front of the aircraft.