Armstrong Siddeley

Former British engineering group

Armstrong Siddeley

Industry| Motor cars

Aircraft engines

Light engineering
Founded| 1919
Defunct| 1960
Fate| Merged with Hawker Aircraft (1935)
became Hawker Siddeley

Merged with Bristol Aero Engines (1960)
became Bristol Siddeley

Merged with Rolls-Royce (1966)
Successor| Armstrong Siddeley Owners Club Ltd
Headquarters| Coventry, England

Key people

| John Davenport Siddeley
Parent| Armstrong Whitworth (1919–27)
Subsidiaries| Armstrong Whitworth Aircraft (1927–35)

Armstrong Siddeley was a British engineering group that operated during the first half of the 20th century. It was formed in 1919 and is best known for the production of luxury vehicles and aircraft engines.

The company was created following the purchase by Armstrong Whitworth of Siddeley-Deasy, a manufacturer of luxury motor cars that were marketed to the top echelon of society. After the merge of companies, this focus on quality continued throughout in the production of cars, aircraft engines, gearboxes for tanks and buses, rocket and torpedo motors, and the development of railcars. Company mergers and takeovers with Hawker Aviation and Bristol Aero Engines saw the continuation of the car production which ceased in August 1960.

The company was absorbed into the Rolls-Royce conglomerate which was interested in the aircraft and aircraft engine business. Eventually, the remaining spares and all motor car interests were sold to the Armstrong Siddeley Owners Club Ltd, which now owns the patents, designs, copyrights and trademarks, including the name Armstrong Siddeley.

Considered "an elegant car appropriate for royal use", the "Armstrong Siddeley Saloon" was used by the Prince of Wales (later King Edward VIII) during his 1930 tour of Uganda.[1]

## History[edit]

### Siddeley Autocar[edit]

Name plate: Vickers, Sons & Maxim — Wolseley Siddeley

The Siddeley Autocar Company, of Coventry, was founded by John Davenport Siddeley (1866–1953) in 1902. Its products, made for him by a Vickers subsidiary, were heavily based on Peugeots using many Peugeot parts and fitted with English-built bodies. J. D. Siddeley was appointed London sales manager of Vickers Limited's subsidiary Wolseley in early 1905[2] at the same time as Wolseley purchased the goodwill and patent rights of his Siddeley car.[note 1] A few months later Herbert Austin left to form his own business and Siddeley was appointed general manager.[3]

Without the consent of the Vickers brothers Siddeley added his own name to the Wolseley nameplate but it was dropped on his departure.

### Siddeley-Deasy[edit]

Main article: Siddeley-Deasy

In 1909, J. D. Siddeley resigned from Wolseley and in 1910, he took on management of The Deasy Motor Car Manufacturing Company, Limited. The shareholders were so pleased with his success in that post that on 7 November 1912 they unanimously agreed to change the company's name to The Siddeley-Deasy Motor Car Company Limited.[4][5] Siddeley's name had been added to the product's radiator earlier in 1912.[6] His cars began to use the slogan "As silent as the Sphinx", sporting a Sphinx as a bonnet mascot.[7]

### Armstrong Siddeley[edit]

1921 5-litre 30hp Landaulette Advert

In April 1919, Siddeley-Deasy was bought out by Armstrong Whitworth Development Company of Newcastle upon Tyne and in May 1919 became Armstrong Siddeley Motors Ltd, a subsidiary with J. D. Siddeley as managing director. In 1927, Armstrong Whitworth merged its heavy engineering interests with Vickers to form Vickers-Armstrongs. At this point, J. D. Siddeley brought Armstrong Siddeley and Armstrong Whitworth Aircraft into his control. In 1928, Armstrong Siddeley Holdings bought Avro from Crossley Motors. Also that year Siddeley partnered with Walter Gordon Wilson, inventor of the pre-selector gearbox, to create Improved Gears Ltd, which later became Self-Changing Gears – the gearbox that should be credited with enabling the marketing tagline "Cars for the daughters of gentlemen".

Armstrong Siddeley manufactured luxury cars, aircraft engines, and later, aircraft. In 1935, J. D. Siddeley's interests were purchased for £2 million[8] by aviation pioneer Tommy Sopwith, owner of Hawker Aircraft, to form – along with the Gloster Aircraft Company and Air Training Services – Hawker Siddeley, a famous name in British aircraft production. Armstrong Whitworth Aircraft and Armstrong Siddeley Motors became subsidiaries of Hawker Siddeley, with Sopwith himself becoming the new chairman of Armstrong Siddeley Motors. At this time, there remained an "unbroken business association" between the Siddeley family and the Middleton-Joy family who were manufactures of Filtrate Oil and had enjoyed considerable success in car-racing rallies.[9]

Armstrong Siddeley was merged with the aircraft engine business of Bristol Aeroplane Company (Bristol Aero Engines) to form Bristol Siddeley as part of an ongoing rationalisation under government influence of the British aircraft and aircraft engine manufacturers. Armstrong Siddeley produced their last cars in 1960. Bristol Siddeley and Rolls-Royce merged in 1966, the latter subsuming the former which remained for a while as an aircraft engine division within Rolls-Royce.

In June 1972, Rolls-Royce (1972) Ltd sold all the stock of spares plus all patents, specifications, drawings, catalogues and the name of Armstrong Siddeley Motors Ltd to the Armstrong Siddeley Owners Club Ltd. This meant that "Armstrong Siddeley" and "A-S Sphinx Logo" are trademarks and copyright of the Armstrong Siddeley Owners Club Ltd.

The "Siddeley" name survived a while longer in aviation, through Hawker Siddeley Aviation and Hawker Siddeley Dynamics. In 1977 they joined with others to become British Aerospace (BAe) which with further mergers is now BAE Systems.

## Products[edit]

### Motor cars[edit]

Coupé utility for the postwar export drive

The first car produced from the union was a fairly massive machine, a 5-litre 30 hp. A smaller 18 hp appeared in 1922 and a 2-litre 14 hp was introduced in 1923. 1928 saw the company's first 15 hp six; 1929 saw the introduction of a 12 hp vehicle. This was a pioneering year for the marque, during which it first offered the Wilson preselector gearbox as an optional extra; it became standard issue on all cars from 1933. In 1930 the company marketed four models, of 12, 15, 20, and 30 hp, the last costing £1450.

The company's rather staid image was endorsed during the 1930s by the introduction of a range of six-cylinder cars with ohv engines, though a four-cylinder 12 hp was kept in production until 1936.

In 1932 - or thereabouts, a line of special, rather more sporty designs was started which resulted in the Rally Tourer series. The aim was to help shake off the somewhat pedestrian image of what was in fact a rather advanced product. Of the 16 rally tourers built, many were used by the owners or senior directors, and were entered into various rallies, achieving some good results and making for good publicity. Only one of those 16 special cars is now known to exist: a 1933, Long-15 Rally Tourer which, according to the records, shared the same body as the 20 hp version (which had a slightly longer bonnet).

In 1933, the 5-litre six-cylinder Siddeley Special was announced, featuring a Hiduminium aluminium alloy engine; this model cost £950. Car production continued at a reduced rate throughout 1940, and a few were assembled in 1941.

The week that World War II ended in Europe, Armstrong Siddeley introduced its first post-war models; these were the Lancaster four-door saloon and the Hurricane drophead coupe. The names of these models echoed the names of aircraft produced by the Hawker Siddeley Group (the name adopted by the company in 1935) during the war. These cars all used a 2-litre six-cylinder (16 hp) engines, increased to 2.3-litre (18 hp) engines in 1949. From 1949 to 1952 two commercial variants of the 18 hp Whitleys were produced, primarily for export. The Utility Coupé was a conventional coupe utility style vehicle, while the Station Coupé was effectively a dual cab vehicle, although it still retained only two doors. However, it did have two rows of seating to accommodate up to four adults and the doors were larger to allow better access to the rear. From 1953 the company produced the Sapphire, with a 3.4-litre six-cylinder engine.

In 1956, the model range was expanded with the addition of the 234 (a 2.3-litre four-cylinder) and the 236 (with the older 2.3-litre six-cylinder engine). The Sapphire 346 sported a bonnet mascot in the shape of a sphinx with namesake Armstrong Siddeley Sapphire jet engines attached. The 234 and 236 Sapphires might have looked to some of marque's loyal customers like a radical departure from the traditional Armstrong Siddeley appearance. However, in truth, they were simply too conservative in a period of rapidly developing automotive design. If the "baby Sapphire" heralded the beginning of the end for Armstrong Siddeley, it was because Jaguar had launched the unitary-construction 2.4 saloon in 1955, which was quicker, significantly cheaper, and much better-looking than the 234 and 236.

The last new model produced by Armstrong Siddeley was 1958's Star Sapphire, with a 4-litre engine, and automatic transmission. The Armstrong Siddeley was a casualty of the 1960 merger with Bristol; the last car left the Coventry factory in 1960.

#### Model list[edit]

Cars produced by Armstrong Siddeley had designations that came from the tax horsepower rating of their engines.

Lancaster six-light saloon Whitley four-light sports saloon Typhoon fixed head coupé Hurricane drophead coupé Model name  | Type  | Engine  | From  | To  | No. produced

|
|
|
|
|

Thirty | Various  | 4960 cc  | 1919  | 1931  | 2770
Eighteen | Various  | 2400 cc  | 1921  | 1925  | 2500 (combined)
18/50 or 18 Mk.II | Various  | 2872 cc  | 1925  | 1926
Four-Fourteen | Various  | 1852 cc  | 1923  | 1929  | 13,365
Twenty | Short and Long chassis  | 2872 cc  | 1926  | 1936  | 8847
Fifteen | Tourer, saloon  | 1900 cc  | 1927  | 1929  | 7203 inc 15/6
Twelve | Tourer, saloon, sports  | 1236 (1434 cc from 1931)  | 1929  | 1937  | 12500
15/6 | Tourer, saloon, sports  | 1900 cc (2169 cc from 1933)  | 1928  | 1934  | 7206 inc Fifteen
Siddeley Special | Tourer, saloon, limousine  | 4960 cc  | 1933  | 1937  | 253
Short 17 | Coupe, saloon, sports saloon  | 2394 cc  | 1935  | 1938  | 4260 (combined)
Long 17 | Saloon, tourer, Atalanta sports saloon, Limousine, landaulette  | 2394 cc  | 1935  | 1939
12 Plus & 14 | Saloon, tourer  | 1666 cc  | 1936  | 1939  | 3750
20/25 | Saloon, tourer, Atlanta sports saloon

Limousine, landaulette

| 3670 cc  | 1936  | 1940  | 884
16 | Saloon, Sports saloon  | 1991 cc  | 1938  | 1941  | 950
Lancaster 16 | 4-door saloon  | 1991 cc  | 1945  | 1952  | 3597 (combined)
Lancaster 18 | 4-door saloon  | 2309 cc  | 1945  | 1952
Hurricane 16 | Drophead coupé | 1991 cc  | 1945  | 1953  | 2606 (combined)
Hurricane 18 | Drophead coupé  | 2309 cc  | 1945  | 1953
Typhoon | 2-door fixed-head coupé | 1991 cc  | 1946  | 1949  | 1701
Tempest | 4-door fixed-head coupé | 1991 cc  | 1946  | 1949  | 6
Whitley 18 | Various  | 2309 cc  | 1949  | 1953  | 2624
Sapphire 346 | 4-door saloon & Limousine  | 3435 cc  | 1952  | 1958  | 7697
Sapphire 234 | 4-door saloon  | 2290 cc  | 1955  | 1958  | 803
Sapphire 236 | 4-door saloon  | 2309 cc  | 1955  | 1957  | 603
Star Sapphire | Saloon & Limousine  | 3990 cc  | 1958  | 1960  | 980
Star Sapphire Mk II | Saloon & Limousine  | 3990 cc  | 1960  | 1960  | 1

A feature of many of their later cars was the option of an electrically controlled pre-selector gearbox.

* Twelve 1½-litre

* Fifteen 2-litre

* Sixteen 2¼-litre

* Seventeen 2½-litre

* Thirty 5-litre

* Sapphire 234
2.3-Litre 4-cylinder

* Armstrong Siddeley's sphinx

* Sapphire 346
3.4-Litre 6-cylinder

* Star Sapphire
4-Litre 6-cylinder

* Sapphire 200
turbojet

#### Clubs[edit]

Like many British cars of this era, there are active owners' clubs supporting their continued use in several countries, e.g. the UK, Australia, New Zealand, the Netherlands and Germany. Armstrong Siddeley Owners Club Ltd has members worldwide and many members of the ASCC in Australia are resident overseas.

In the United Kingdom, ASOC publishes a monthly members magazine Sphinx. In Australia, the Armstrong Siddeley Car Club publishes Southern Sphinx six times a year. In the Netherlands, ASOC Dutch also publishes six times a year, and in New Zealand, Armstrong Siddeley Car Club in New Zealand Inc. publish Sphinx-NZ monthly.[10]

### Aircraft engines[edit]

Armstrong Siddeley Lynx 7 cylinder radial from the Avro 618 Ten aircraft, Southern Cloud

Throughout the 1920s and 1930s, Armstrong Siddeley produced a range of low- and mid-power aircraft radial engines, all named after big cats. They also produced a tiny 2-cylinder engine called the Ounce, another name for the snow leopard, for ultralight aircraft.

The company started work on their first gas turbine engine in 1939, following the design pioneered at the Royal Aircraft Establishment by Alan Arnold Griffith. Known as the "ASX" for "Armstrong Siddeley eXperimental", the original pure-turbojet design was later adapted to drive a propeller, resulting in the "ASP". From then on, AS turbine engines were named after snakes. The Mamba and Double Mamba were turboprop engines, the latter being a complex piece of engineering with two side-by-side Mambas driving through a common gearbox, and could be found on the Fairey Gannet. The Python turboprop powered the Westland Wyvern strike aircraft. Further development of the Mamba removed the reduction gearbox to give the Adder turbojet.

Another pioneer in the production of the RAE engine design was Metrovick, who started with a design known as the Metrovick F.2. This engine never entered production, and Metrovick turned to a larger design, the Beryl, and then to an even larger design, the Sapphire. Armstrong Siddeley later took over the Sapphire design, and it went on to be one of the most successful 2nd generation jet engines, competing with the better-known Rolls-Royce Avon.

The company went on to develop an engine – originally for unmanned Jindivik target drones – called the Viper. This product was further developed by Bristol Siddeley and, later, Rolls-Royce and was sold in great numbers over many years. A range of rocket motors were also produced, including the Snarler and Stentor. The rocket development complemented that of Bristol, and Bristol Siddeley would become the leading British manufacturer of rocket engines for missiles.

Aero and rocket engines  | year  | type

|
|

Armstrong Siddeley Cheetah | 1935  | 7-cyl radial
Armstrong Siddeley Civet | 1928  | 7-cylinder radial
Armstrong Siddeley Cougar | 1945  | 9-cylinder radial not-produced
Armstrong Siddeley Deerhound | 1935  | 21-cylinder 3-row in-line radial engine. Not produced
Armstrong Siddeley Genet | 1926  | 5-cylinder radial
Armstrong Siddeley Genet Major | 1928  | radial
Armstrong Siddeley Hyena | 1933  | experimental 15-cylinder 3-row inline radial
Armstrong Siddeley Jaguar | 1923  | 14-cylinder 2-row radial
Armstrong Siddeley Leopard | 1927  | 14-cylinder, 2-row radial
Armstrong Siddeley Lynx | 1920  | radial
Armstrong Siddeley Mongoose | 1926  | 5-cyl radial
Armstrong Siddeley Ounce | 1920  | 2-cylinder opposed
Armstrong Siddeley Panther | 1929  | 14-cylinder 2-row radial
Armstrong Siddeley Serval | 1928  | 10-cylinder 2-row radial
Armstrong Siddeley Tiger | 1932  | 14-cylinder 2-row radial supercharged
Armstrong Siddeley ASX | 1945  | axial flow turbojet
Armstrong Siddeley Python | 1945  | turboprop, also known as ASP
Armstrong Siddeley Double Mamba | 1949  | Two Mamba linked by gearbox
Armstrong Siddeley Mamba | 1946  | turboprop
Armstrong Siddeley Sapphire | 1948  | turbojet
Armstrong Siddeley Adder | 1948  | turbojet
Armstrong Siddeley Viper | 1951  | turbojet
Armstrong Siddeley Snarler | 1950  | rocket

### Diesel engines[edit]

In 1946 Armstrong Siddeley produced their first diesel engines. They were medium-speed engines for industrial and agricultural use. Initially there was a single-cylinder engine producing 5 bhp (3.7 kW) at 900 rpm and a twin-cylinder version. Each cylinder had a capacity of 988 cm3 (60.2 cubic inches). The power output and speed was progressively increased. By the end of 1954 the single-cylinder engine was rated at 11 bhp (8.2 kW) at 1800 rpm and the twin-cylinder engine 22 bhp (16 kW) at the same speed. In 1955 the range was extended with the introduction of a 3-cylinder engine rated at 33 bhp (25 kW).[11]

The engines were built at Armstrong Siddeley's factory at Walnut Street in Leicester until that factory closed in August 1957.[12] Production was transferred to the factory of Armstrong Siddeley (Brockworth) Ltd in Gloucestershire and in 1958 to the factory of Petters Limited at Staines, Middlesex. The engines built by Petters were designated AS1, AS2 and AS3 to distinguish them from that company's other products. Production ended in 1962 when Petters introduced a replacement range of lightweight small high-speed air-cooled diesel engines.[13]

In April 1958 the company obtained a licence to build the Maybach MD series high-speed diesel engines.[14] Several hundred were built by  Bristol Siddeley Engines Ltd after that company took over Armstrong Siddeley's manufacturing activities in 1959.

## See also[edit]

* List of aircraft engines
* List of car manufacturers of the United Kingdom

## Notes[edit]

1. ^ "The Wolseley Tool and Motor-Car Company Limited has absorbed the Siddeley Autocar Company Limited and has acquired Niagara Westminster for premises for a London office and garage. The two companies have long been associated, the Siddeley cars being made by the Wolseley company." The Times, Monday, 13 Feb 1905; pg. 9; Issue 3762

## References[edit]

Citations

1. ^ "1930 - Uganda Safari by HRH Prince of Wales - Armstrong-Siddeley Saloon". Retrieved 31 January 2022. "This is a photograph of the long twenty Armstrong-Siddeley Saloon of the same style used by HRH in Uganda. It was an elegant car thought appropriate for royal use."
2. ^ "City Notes". The Times. No. 44569\. 30 April 1927. p. 18.
3. ^ Lambert (1968), Chapter 6: The Austin Motor Company is formed
4. ^ Deasy Motor-Car Manufacturing Company (Limited). The Times, Friday, 8 November 1912; pg. 21; Issue 40051.
5. ^ Deasy Motor Car Manufacturing Co minute book, pp. 245 and 243. Original document held at Coventry Archives with reference PA1060/1/1.
6. ^ Smith (2006), p. 55.
7. ^ Kay & Springate (2014), p. 18.
8. ^ Smith (2006), p. 494.
9. ^ "Fluid Flywheels". Leeds Mercury Yorkshire, England. 7 March 1932. Retrieved 27 October 2022. "J.A. Middleton-Joy, of Leeds, whose success in winning The Yorkshire Post Cup was announced to-day, drove a fifteen-horsepower short wheelbase Armstrong-Siddeley, which was not fitted with any special device, although has the standard Armstrong-preselect,... [Also]-Yorkshire Post and Leeds Intelligencer Yorkshire, England - 7 Mar 1932, In 1903 Mr. J.D. Siddeley asked Mr. Joy to produce an oil specially suitable for the Siddeley-Deasy cars he was then producing, and from then onwards there has been an unbroken business association between the Siddeley and [Middleton] Joy families."
10. ^ ASOC Ltd and ASCC Australia.
11. ^ Armstrong Siddeley Air-Cooled Diesel Engines by Sid Beck in Stationary Engine April 1992 reprinted in Rolls-Royce Heritage Trust Sphinx newsletter 49, December 2001
12. ^ Armstrong Siddeley Motors, Minutes of Board Meeting, 1 October 1957
13. ^ Armstrong Siddeley Air Cooled Diesel Engines by Tom Smith in Rolls-Royce Heritage Trust Sphinx newsletter 54, 2004
14. ^ Armstrong Siddeley Motors, Minutes of Board Meetings, 2 April 1958 and 28 April 1958

Bibliography

* Kay, David; Springate, Lynda (2014). Automotive Mascots: A Collector's Guide to British Marque, Corporate & Accessory Mascots (eBook). Veloce Publishing. ISBN 978-1-84584-785-2.
* Smith, Bill (2006). Armstrong Siddeley Motors: The cars, the company and the people in definitive detail. Dorchester, UK: Veloce Publishing. p. 55\. ISBN 978-1-904788-36-2.

## Further reading[edit]

* Robert Penn Bradly: Armstrong Siddeley, the Post War Cars; Motor Racing Publications, Croydon, 1989.
* Robert Penn Bradly: The 346 Sapphire explored to great depth; Pimula PTY Pvt., Bardwell Park, NSW, 2008.
* Bruce Lindsay: Armstrong Siddeley, the Sphinx with the heart of a lion; Lindsay family trust, Thailand, 2010.

## External links[edit]

Wikimedia Commons has media related to Armstrong Siddeley.

* Armstrong Siddeley Owners Club for the cars
* Non-affiliated Internet forum for Armstrong Siddeley enthusiasts world-wide
* Documents and clippings about Armstrong Siddeley in the 20th Century Press Archives of the ZBW

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* Electric Car Corporation
* Ginetta
* Jaguar Land Rover
* Jaguar
* Land Rover
* Castle Bromwich plant
* Gaydon Centre
* Halewood plant
* Solihull plant
* Whitley Engineering Centre
* Lightning
* Lister
* Geely
* Lotus
* McLaren
* McLaren Technology Centre
* SAIC Motor UK
* Eco Concept
* Morgan
* Nissan UK
* Noble
* Overfinch
* Radical
* Spyker
* Toyota UK
* TVR
* Vauxhall
* Ellesmere Port
* Westfield
* Zenos

Kit cars
Caterham
Davrian
GKD
GTM
JBA Motors
Marc Nordon Racing
Onyx
Quantum
Sylva
Ultima Sports
Westfield

|

Former|

* Allard
* Alvis
* Armstrong Siddeley
* Ascari
* Austin
* Austin-Healey
* Belsize
* Bond
* Bristol
* BMC
* BMH
* British Leyland
* Caparo
* Clément-Talbot
* Daimler
* Eagle Cars
* Fenix
* Ford
* Frazer Nash
* Gilbern
* Jensen
* Jowett
* Lanchester
* Marcos Engineering
* Melling
* MG Rover
* MG
* Longbridge plant
* Morris
* Peel Engineering
* Reliant
* Riley
* Rootes
* Ryton plant
* Rover Company
* Rover Group
* Standard
* Sunbeam
* Sunbeam-Talbot
* Triumph
* Trojan
* Wolseley

Suppliers and
consultancies

| Current|

* Cosworth
* Cummins UK
* Dunlop Tyres
* GKN
* GKN Driveline
* Grayson Thermal Systems
* Johnson Matthey
* Kahn Design
* Lotus Engineering
* Millbrook
* MIRA
* Perkins Engines
* Pilkington
* Quaife
* Ricardo
* Tata Steel Europe
* Tickford
* Transport Research Laboratory
* Unipart
* WMG
* Wipac
* Zytek Automotive

|

Former|

* Abbey Panels
* Caparo Vehicle Technologies
* Dunlop Rubber
* Ferodo
* Gardner
* Hardy Spicer
* Henry Meadows
* Laycock Engineering
* Lucas Industries
* LucasVarity
* Tomkins
* White and Poppe

Dealerships|

* Arnold Clark
* Carcraft
* Ford Retail Group
* Group 1 Automotive
* Inchcape
* Jardine
* JCT600
* Lookers
* H.R. Owen
* Jack Barclay Bentley
* Pendragon
* Perrys
* Robins & Day
* Stoneacre
* Sytner
* Vertu

Other services|

* ATS Euromaster
* Autoglass
* Auto Windscreens
* British Vehicle Rental and Leasing Association
* Constellation Automotive Group
* Green Flag
* Halfords Autocentre
* Halfords
* HiQ (tyres)
* Kwik Fit
* LeasePlan
* Lex Autolease
* Millbrook Proving Ground
* National Tyres and Autocare
* RAC
* The AA
* We Buy Any Car

Government and
regulatory bodies

* Automotive Council UK
* Department for Transport
* Driver & Vehicle Licensing Agency
* Driving Standards Agency
* Vehicle Certification Agency
* Vehicle & Operator Services Agency

Related topics|

* AM Magazine
* Autocar
* Autosport
* Auto Trader
* Auto Express
* Buses
* Car
* Classic & Sports Car
* Coach & Bus Week
* Commercial Motor
* Evo
* Fast Car
* Fifth Gear
* Institute of Advanced Motorists
* Motor Sport
* Octane
* Royal Society for the Prevention of Accidents
* Society of Motor Manufacturers and Traders
* Top Gear (magazine)
* Top Gear (TV series)
* What Car?

* Category
* Commons

* v
* t
* e

Armstrong Siddeley aero engines

Piston engines|

* Boarhound
* Cheetah
* Civet
* Cougar
* Deerhound
* Genet
* Genet Major
* Hyena
* Jaguar
* Jaguar Major
* Leopard
* Lynx
* Lynx Major
* Mongoose
* Ounce
* Panther
* Puma
* Serval
* Tiger (V12)
* Tiger (Radial)
* Wolfhound

Turbojets|

* Adder
* ASX
* Sapphire
* Viper

Turboprops|

* ASP
* Double Mamba
* Mamba
* Python

Rocket engines|

* Beta
* Snarler
* Screamer
* Stentor
* Gamma

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