The Weller brothers of West Norwood showed their first car at the 1903 Crystal Palace Motor Show, but their financial backer preferred small delivery vehicles. Success led them first back to conventional cars, and then to investment from S. F. Edge. However, falling sales meant that the company was caught by the crash of 1929. Its new buyers did not originally intend to make new cars but eventually struck a deal with Standard to supply the chassis necessary to see production through the 1930s.

AC Sociable
AC (Auto Carrier) started making 3-wheeled delivery vehicles in 1904; the Sociable was the passenger car.
Years
1907-1914
Engine
631cc S2
Body Style
.
Production
1800
Power: Weight
.
Dimensions
.

c / 12 HP (12/24)
4-wheel light car production started just before the war. Several thousand were sold in the 1920s, in an old balloon factory in Thames Ditton.
Years
1913-20; 1920-28
Engine
1319/1496cc S4
Body Style
.
Production
Power: Weight
.
Dimensions
.

AC Six (16/56, 16/66, 16/70)
The six range included Aceca DHC, and a Six was the first British car to win the Monte Carlo rally in 1926. New models came in 1933 after a brief hiatus.
Years
1921-39
Engine
1478/1922cc S6
Body Style
2- and 4-door saloons and coupés/DHC;
Production
587
Power: Weight
.
Dimensions
.

AC Six (16/70)
S. F. Edge of Napier fame bought into AC in 1921, and started promoting AC through competition, notably at Brooklands. This continued through the 1930s (car shown is a 16/70 March special).
Years
1921-39
Engine
1922cc S6
Body Style
2- and 4-door saloons and coupés/DHC;
Production
587
Power: Weight
.
Dimensions
.

AC Six (16/80, 16/90)
.
Years
1936-39
Engine
1478/1922cc S6
Body Style
.
Production
44
Power: Weight
.
Dimensions
.