Armstrong Siddeley 12 hp

Production period:	1929 to 1939
Type :	motor car
Class :	Touring car , sedan ,roadster
Engines:	Petrol: 1236cc-1434cc-1666 cc
Length:	3962 mm
Width:	1524 mm
Wheelbase :	2464-2667 mm

The Armstrong Siddeley 12 hp is a car built by the British manufacturer Armstrong Siddeley from 1929 up to the second world war in 1939 as the smallest model.The 12 hp came out in 1929 as the smallest model of the manufacturer. Still like the manufacturer 's largest contemporary models, this had a side mounted six cylinder in-line engine . Its capacity was 1236 cc (bore × stroke = 56 mm × 84 mm). 

Like all pre-war models by Armstrong Siddeley, the 12 hp also had two rigid axles. Both hung on semi-elliptical longitudinal leaf springs.  The model was delivered as a touring car, sedan or sports roadster.

1931 appeared the 12 hp Mark II . The cars were bigger than their predecessors and there was a bigger engine. Chassis with two wheelbases (2464 mm and 2667 mm) were available.

The new, still side-controlled engine had a capacity of 1434 cc (bore × stroke = 59.25 mm × 84 mm).. 100 km / h is given as the maximum speed. 

The 12 hp Mark II was built untill 1936. Of both models (12 hp and 12 hp Mark II) together 12,500 copies were built.

In 1936, the 12 hp Mark III replaced the 12 hp Mark II hp. A year later it became without further change 14 hp . Both bodies and engine had grown a bit. The new engine  now had a displacement of 1666 cc (bore × stroke = 61 mm × 95.25 mm). This made 48 bhp (35 kW) at 4000 rpm. The maximum speed is specified at 106 km / h.

The sports roadster was no longer offered. Of both models (12 hp Mark III and 14 hp) together created 3750 pieces now into the war-related production but without successor in 1939.