The Lagonda 11 was a car made between 1913 and 1921.

The 11 had a 1099cc inlet-over-exhaust-valve 4-cylinder engine.

The was car was 3.05 m (120 in) long and the wheelbase was 2.36 m (92.9 in) long. The front suspension was torsion leaf and the rear suspension was 1/4 elliptical leaf-springs.

The car also featured an anti-roll bar and a rivetted monocoque body and the first ever fly-off handbrake.