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Vauxhall A-Type

Vauxhall 20 22 and 16-20
A
Vauxhall A-Type A12 3.4-litre 1912.jpg
22.4 horsepower A12 3½-litre, 1912
Overview
Manufacturer Vauxhall
Production October 1908 to 1915
Assembly Luton Bedfordshire
Designer Laurence Pomeroy
Powertrain
Engine 4-cylinder inline
186 cu in (3,054 cc)
208 cu in (3,402 cc)
Transmission manual: 4-speed and reverse
(some early cars 3 speed)
clutch
early cars— cone
later cars— multi-plate in graphite
final drive by—
Dimensions
Wheelbase 2,921.0 mm (115 in)
3,124.2 mm (123 in)
Length width and height depending on coachwork
Kerb weight depends on coachwork
Vauxhall 20 and 22
A
Overview
Manufacturer Vauxhall
Combustion chamber
Configuration in-line 4-cylinder
Displacement 3054 c.c.
(3½-litre 3402 cc)
Cylinder bore 90mm
(3½-litre 95mm)
Piston stroke 120mm
Cylinder block alloy
Sheet copper sump in very early cars, later cast alloy
Valvetrain camshaft gear-driven until 16-20 was driven by chain
Combustion
Fuel system Carburettors:
White & Poppe
Zenith
Claudel Hobson
gravity or forced feed
Fuel type petrol
Cooling system thermo syphon
Output
Power output 1909 38 bhp (28 kW; 39 PS)
1910 60 bhp (45 kW; 61 PS)
1913 80 bhp (60 kW; 81 PS)
tax horsepower:
3054cc 20.09hp
3402cc 22.38hp

The Vauxhall 20 h.p. chassis code A, was a four-cylinder medium-sized car manufactured by Vauxhall from 1908 to 1914 with one more built in 1920. It was the first production Vauxhall designed by Laurence Pomeroy. It became a highly acclaimed 3 litre of its day and at Brooklands on 26 October 1910 it became the first 20 hp car to exceed 100 mph (160 km/h).

Laurence Pomeroy had joined Vauxhall in 1907 as an assistant draughtsman at the age of twenty-two. He first made his mark at the 1908 RAC and Scottish Reliability Trial, held in June of that year. His first prototype, a development of Vauxhall's 12-16 and named Y1, had outstanding success showing excellent hill climbing ability with an aggregate of 37 seconds less time in the hill climbs than any other car in its class and unparalleled speeds around the Brooklands circuit. His Vauxhall was so far ahead of all cars whatever class that the driver could relax, accomplishing the 200 miles (320 km) at an average speed of 46 mph (74 km/h), when the car was capable of 55 mph (89 km/h). It went on to win class E of the Trial. That design was put into production in 1908 as Vauxhall's 20 hp offering. Four distinct variations were produced between 27 October 1908 and the end of production in 1914. One last car was put together in 1920.

The 3-litre side-valve monobloc engine was provided with forced lubrication . The camshaft and magneto were gear-driven until the 16-20 when it was changed to chain drive.

Reviewing the exhibits at the North of England Motor Show at the beginning of 1912 the Manchester Guardian reported that the 20 h.p. engine had been given for 1912 new light connecting rods of very high grade steel and pistons reduced in weight to give smooth running.

The A09 and A11 were supplied with a four-speed gearbox though some of the earliest cars retained the three-speed gearboxes of the 12-16 and at least 70 of the first cars also retained the sheet copper sump of their predecessor. There was a major revision of the chassis for the A12 and for the 16-20 both engine and chassis underwent major redesign.

In November 1912 immediately before the opening of the Olympia Show Vauxhall announced their full range for 1913 would be four chassis:

all were to have 4-speed gearboxes


See the table below for more information.

A09

A11

A12

A12

A12

Oct 1920 (one car)

3 Litre

90 x120

90 x120

90 x120

95 x120

90 x120

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-

-

-

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