The Lagonda Rapier was a small car produced by the British company Lagonda from 1934 to 1935, production was then taken over by Rapier CarsLTD in 1936.

The frame was designed by Charles King and made of steel sections.

Engine design was carried out by Thomas Ashcroft and production contracted to Coventry Climax.

The factory supplied rolling chassis and customers could choose their own body, most were bodied by Abbott but also John Charles, Maltby and Ej Newns. When production resumed in 1936, Ranelagh was the only coachbuilder until 1938 with a total production of 46 cars.