Riley 12/6

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Riley 12/6
Riley Lincock Fixedhead Coupe 1934.jpg
Riley 12/6 Lincock fixed head coupé
Overview
Manufacturer Riley
Production1932–1935
Designer Percy and Stanley Riley
Body and chassis
Body style 4-door saloon
2-door coupe
2-door convertible
Powertrain
Engine 1.5 L Straight-6
Dimensions
Wheelbase 114 in (2,896 mm) [1]
Chronology
PredecessorNone
Successor Riley 12/4

The Riley 12/6 was a car made by the British Riley company from late 1932 (for the 1933 model year [2] ) to 1935.

It had a 1458 cc straight-six engine with twin cams and either single, twin or triple SU carburettors. The transmission was either a four speed manual or optional preselector gearbox. They were capable of a top speed of around 70 mph (113 km/h). [1] The chassis was a lengthened version of the one used on the Riley Nine.

They were available in a range of models: Mentone saloon, Kestrel saloon, Lincock fixed head coupé, Ascot drophead coupé with dickey seat, Lynx tourer, Falcon saloon, Gamecock tourer, March two-seat tourer, MPH two seater trial/sports 2-seater, and Trinity 3-position Drophead Coupé.

The 12/6 engine was designed to fit in between the 9 and 14/6 engines for trialing and racing purposes. The 9 was 1087 cc, fitting in the 1100 cc class, and the 14/6 was 1633 cc, fitting in the over-1500 cc class. A 1486 cc "Brooklands Six" was developed to compete in the sub-1500 cc International Class F, with two or three cars built in mid-1932. [3] Another such engine was fitted to an Alpine Tourer for the 1932 Monte Carlo Rally, where it finished second in class. [4] The 1458 cc 12/6 was derived from the Brooklands Six. The slightly larger "Brooklands" engine continued to see some limited use, such as in the 1933 Riley Grebe prototype and in the TT Six. [2]

As the 14/6 was basically a 9 with two extra cylinders on the end, the 9 and 14/6 engines shared the same parts and spares. The 12/6 didn't share parts with any other Riley, so many 12/6s have been bored out to the size of a 14/6 to compensate for spares. All of these engines share the same 95.2 mm (3.75 in) stroke. The 12/6 has a 57 mm (2.24 in) bore, while the "Brooklands" competition engine has a 57.546 mm (2.27 in) mm bore.

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References

  1. 1 2 Culshaw; Horrobin (1974). Complete Catalogue of British Cars. London: Macmillan. ISBN   0-333-16689-2.
  2. 1 2 "Riley 1933". Classic Car Catalogue. Archived from the original on 9 August 2020.
  3. "Riley 1932". Classic Car Catalogue. Archived from the original on 13 December 2020.
  4. Hamberg, Erik (1998). "Rileys svenska Monte Carlo-historia" [Riley's Swedish Monte Carlo history](PDF). Rileybladet (in Swedish). Svenska Rileyregistret. 20 (2): 1. Archived from the original (PDF) on 13 December 2020.