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 1923-1927  . . .40hp and the first 9's as Saloons, Coupe', Coupe de
                    Ville, Sports etc

Percy Riley's 9 was introduced in 1926 in a humble but cleverly designed fabric bodied saloon, a small cc, high revving unit. Using hemispherical combustion chambers and inclined overhead valves, plus twin camshafts set high in the cylinder block and valves operated by short pushrods, it provided power and efficiency without the  complexity of an OHC (overhead camshaft) layout. As it was so basic and logical to work on it soon attracted the attention of 'tuners' and builders of 'specials'  for sporting purposes.

The Riley 9 "Monaco" started full production in 1927 and caused  a stir with its closed bodywork, integral rear boot plus the overhead valve engine. Later  the same  year three variants arrived, a 2 seater tourer with dickey seat, a 4 seater saloon called the "San Remo" and the sporty 80MPH "Brooklands". Later during 1928 this range was dramatically extended with five new body types the 'worths, "Lulworth", "Midworth", "Grangeworth", "Chatsworth" saloons plus the "Wentworth Coupe" all with a restyled engine. By the end of 1928 the "9 Biarritz" was introduced and the old side valve 12hp was replaced by a new 14hp 6 cylinder 14/6 range which was actually a larger version of the "9", and models included the "Stelvio","Deauville saloon" and the "Special Tourer".


PRICES Riley All-Season 4-Seater £395 Riley All-Season 2-Seater £390 Riley All-Season 4-Seater De Luxe, with special equipment £460 Riley Saloon, with Bedford Cord (Leather £10 extra) £495 Riley 2-Seater Coupe £460 Riley 4-Seater Sports. 60 m.p.h. £450 guaranteed Riley 2-Seater Sports, 70 m.p.h. £495 guaranteed the Riley 11 All-season four-seater (closed,/.

FARMAN (ENGLAND), 26, Albemarle Street, London, W.l 'Phone Regent 2938 from The Sketch - Wednesday 17 October 1923

New Riley Closed Car. The horse-power denomination of small cars is on the upward trend, as I notice that the new Riley "coach," fitted on the standard Riley chassis, is now styled the Riley 12-h.p., though formerly known as the 11-40-h.p. I wish our British motor manufacturers would stick to English terms, and not adopt Americanese, as our public fully understand that a saloon body is the equivalent of the American "coach"; and the latter term in no way expresses the English idea of a "coach," which in truth is a "drag" or "four-in-hand." Anyway, the new 12-h.p. Riley saloon is well worth its moderate price of £395, or, with four-wheel brakes and Maries patent steering, £12 10s. extra. It is fitted with balloon tyres, 29 in. in diameter and 4 "9 5 in. in their section four very large doors, which open outwards from the centre sliding side windows, and a large fixed window in the rear. Silk curtains and Bedford cord upholstery for the roof lining add to its comfort and finish, while the antique leather cushions of the squabs and seats, to match the blue or crimson-lake outside panels of the body, make it quite a carriage of importance, and suitable for hard wear. This closed car can seat five persons, so that four have plenty of room  Motor Dicta.  By Heniochus.  - The Sketch - Wednesday 09 September 1925 

  from The Sketch - Wednesday 04 June 1924 

RECENTLY AWARDED AN R.A.C. CERTIFICATE FOR FUEL ECONOMY A RILEY CAR. The fuel consumption was the rate of 1 gallon of N.B.A. petrol-benzole mixture per 59.12 miles, equalling 64.47 ton miles per gallon. to be compared with racing. These trials are designed far as possible to reproduce touring conditions, admittedly of a severe kind, but, nevertheless, conditions which are likely to be met with in the course of ordinary road travel. The recent London—Land’s End event supplies many cases of failure which go to point the moral that we are still in process of discovering All Articles Select an article below to edit ConUnucd.\ errors anti endeavouring to remedy them. No fewer than 119 cars started, and the very large number of failed  entirely to finish —that is to say, the astonishingly high proportion of 25 per cent, failed on this comparatively short journey of about 400 miles. It has also to be borne in mind that most the cars taking part were picked vehicles, driven by picked drivers. Over and above the absolute failures, of the 90 cars that actually finished, only 53 performed sufficiently well to qualify for the award gold medals. far as it is possible to discover, the chief mechanical weaknesses disclosed were engine failures, clutch trouble, and brakes, in the order named. It is quite unnecessary, however, to into the detailed causes of failure. It is sufficient to point out that, good the modern motor-car undoubtedly is, it is still a very long way from being the perfect mechanism we should like to see it Very few cars arc properly cooled, having regard to the variations in weather and temperature to which this climate is subject. Overcooled in winter, or hopelessly undercooled in summer, are the two extremes of criticism which one often hears levelled against many cars. My present car is very much overcooled. Even without the fan belt, in summer the water never rises to a sufficiently high temperature to ensure the maximum efficiency of the motor. This means that during the winter months one is running with a practically cold engine unless portion of the radiator is blocked out. have three sheets of tin which I use to assist the cooling a large one for the winter, a medium sized for between seasons, and a comparatively narrow strip for the, summer. The car is designed primarily for use in very hilly country, where, no doubt, its very large radiating capacity and efficient water - pump would be a blessing. In this comparatively flat country of ours it is rather the reverse. Still, I would rather have it thus than like some cars I know, which arc almost always on the boil. In some of the more expensive cars the difficulty has been overcome by the fitting of a thermostat to control the water circulation ; but until quite recently this form of control was not available for use on the ordinary car as delivered by its makers.  from Illustrated London News - Saturday 21 April 1923 

SPIRIT: A REMARKABLE R.A.C.-OBSERVED FUEL TEST. Mr. J. Russell-Sharp, seen at the wheel on his Eleven Riley car, drove recently from London to Birmingham, and eight miles beyond, on two gallons of motor spirit, purchased by the R.A.C. and put into the tank by them. The total distance covered was 118* miles, and an observer of the R.A.C. was in the car throughout the journey. The car and all its fittings, including Solex carburetter, were standard. The entire iourney was done on top gear, and at the conclusion a speed of 48’4 m.p.h. was attained.

1925 Riley 11.9 Tourer from Cliff Jones

1924 Riley 4 seat  Redwing Sports showing the earlier engine format from Cliff Jones