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 1923-1927  . . .11/40hp  Saloons, Coupe', Coupe de
                   Ville,  Sports

This was the age when Riley first started expanding their range from the early variety which was basically with or without a roof and two or four seats. Many due to age/scarcity will be shown as contemporary adverts on the 1920's page as many of the 11/40  cars went to the former colonies like Australia  as rolling chassis where their strength and design were appreciated and local bodies were added

Re Tin/Fabric Bodies:- Fabric panelled bodies became popular in the second half of the 20's decade as they stood up better to the flexing of the chassis of the period. Ladder frames, quite strong in the beam, but much less so in torsion. Not so much of a problem with an open tourer, more so as saloons became more in demand, Weymann, bodies were a popular solution, a patented construction system where the joints in the wooden frame were "open", a gap, connected by metal plates, allowing the frame to twist along with the chassis, hence the need for fabric panelling. By the mid thirties, suspension had softened and frames stiffened, making a rigid body a better proposition.Most cars here will have fabric bodies with the bulkhead etc in metal resulting in many being converted to historic specials as the weather takes its toll.

At the Olympia Show of 1919 Riley introduced an entirely new model, the 11/40 10.8hp, developed to enable production to be more straightforward than before. By 1925 the highly successful 11/40 model was upgraded to 11.9hp with an enlarged engine of 1,645cc by increasing the bore from 65.8mm to 69mm, retaining the same 110mm long stroke, thereby raising the sturdy detachable-head side-valve engine’s output from 35bhp at 3,200rpm to 42bhp at 3,600rpm. A larger chassis and front wheel brakes were introduced from 1925. A wide variety of factory body styles were offered, often made by Midland Motor Body, another subsidary Riley family firm

Specs:-A four-cylinder sidevalve engine with 1645 cc displacement,  and water cooling. The engine produced 42 bhp (31 kW) at 3,600rpm and was fitted with a Zenith carburetor. The chassis had a length of 2,743 mm, the bodies of the four-seat touring car were 4115 mm long and 1,676 mm wide. All four wheels were fitted with semi-elliptic leaf springs. The chassis weighed minimum  648 kg. plus the body style of choice  instead of the Zenith carburetor, it had a Cox carburetor

The first main  engine used in the Riley 1920's body was the 10.8 hp in use since 1918 until about 1924. The 12 hp 11/40 type engine was new in 1925 ( in Styles as from 1921) and was meant to be as powerful as the famous Redwings of the 1920's. The engine continued in production until 1928, when it was replaced by the Riley Six which had a  side valve, four cylinder engine driven through a four speed manual gearbox with cone clutch and semi-floating spiral bevel rear axle.

1921-25  11 / 40 h.p. Saloon

sorry revolting scruffy advert done my best

1922-28  11 / 40 h.p. Sports 2 Seater

1922 two Seater Sports sorry only available as advert format ( cleaned up)

1922-24  11 / 40 h.p.. Touring (4dr, 4 seat)


   A stunning pic of an as found 1924 4 door /four seater . Another Australian car often sent over as a rolling chassis shown when sold @ Shannons

Info:- from Shannons "Imported into Melbourne as a chassis in 1924, the vehicle was delivered to the body-builder where it appears a Tourer body was adapted to order to create a fully enclosed Saloon, with unusual full-length sliding glass side windows . As far as I know, this makes it the oldest Saloon Riley in the world, and one of only a handfull of enclosed Sidevalves. Puchased from the family of the second owner in 2012. The car had been in the family's ownership for over 50 years. The condition of the vehicle although 98% complete is such that most of it will require extensive restoration or replacement. It is hoped to put the car back on the road in 2024 for her Centennial. She has been named Melisende."

Release in 1923 as the 1924 Four Door using the 11/40 engine @ £395  It used a 4cyl Sidevalve . Four-seater/ Four-door Tourer produced 1922-24. RAC  Rating 10.8hp  with a Bore 65.8, Stroke 110,  1498 cc, 35bhp at 3200rpm,  Carburation Zephyr or  Zenith. This was sold initially from 1920 as the standard four door saloon at £650 which was reduced the next year 1921 to £565 as more were sold again with the laminated disc wheel . By 1922 this was re named as the 'All Season Four Seater' and now priced at £430

**During  the mid-1920’s a new wheel design was to replace the spokes with laminated, stamped steel discs.  These were patented by the Coventry Disc Wheel Company in 1919 but mostly discontinued from this maker by 1921.  Discs were lighter, stiffer and resistant to damage plus the ability to mass-produce them,  making them a cheaper option. The disc was stamped from sheet metal and welded or riveted to the rim. By the 1930’s a dropped center steel rim with steel spokes became the  standard with makers  differing designs of how the spokes laced the hub to the rim and evolving from the stud fixing to the later spinners or 'knock ons' **

1923-25  11 / 40 h.p. All Season 2 Seater

The only one I can find is  the 1923 car on Riley Robs pages

1923-25  11 / 40 h.p. All Season 4st 2dr

1923 All Weather saloon from the days when glass and rooves were a luxury item to be prized... on disc wheels to be really fashionable but wearing the early pull handles rather than the horizontal safety latches. Very similar to the Farman bespoke version below

One of the more bespoke options for the 11/40 a  FARMAN CHASSIS. FARMAN (ENGLAND) Specialise in the IMMEDIATE DELIVERY ALL MODELS.

The name Farman is  now  associated with the military aeroplanes of the First World War and the commercial aircraft used on long-distance routes between the two World Wars. Although these machines were manufactured in France the three Farman brothers, Henry, Maurice and Richard (Dick), were of English, parentage. Henry was born in Cambrai in 1874 and Maurice in Paris in 1877. They started appearing at the London Motor Shows (either at Olympia or the White City) from 1919 to 1926, with the exception of 1922,and included a Riley in addition to the more ususal Silver Ghosts

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
Advertisment from The Sketch - Wednesday 17 October 1923. Other links here , and for planes + cars here. 

1923-25  11 / 4 0 h.p. 4 Seat Coupe

needs pic + information

1924-25  11 / 4 0 h.p.. 4 Seat De Luxe

needs pic + information

  from The Sketch - Wednesday 04 June 1924 

1924-25  11 / 40 h.p. Saloon De Luxe

needs pic + information

1924-28  11 / 40 h.p. Four Seat Sports

needs pic + information

1924-25  11 / 40 h.p. 2/3 Seat Cloverleaf

In Styles as a concept car not produced and sold

1924-25  11 / 40 h.p. 2/3 Seater

needs pic + information


Survivor 1924 Side Valve Tourer:- NH 557*  Chassis number 205*10.8 engine

1924-25  11 / 40 h.p. Saloon Landaulette

needs pic + information

1925  11 / 40 h.p.. SWB Sports

needs pic + information made to order often in rolling chassis format to add your own body

1925-27  11 / 4 0 h.p.. Special Tourer (2dr 4st)

1925 Riley 11/40 11.9hp Four Seat Tourer Registration no. SV 8971 Chassis no. 6995 Engine no. 4579 / Another Australian re import sold at Bonhams

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 

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 . 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.