Riley RM

Kestrel

The RM was inspired by Riley Motors' successful and stylish pre-war 1.5 and 2.5 Litre Kestrel saloons, but with a new chassis, which with its Riley "torsionic" independent front-wheel suspension incorporated the experience of the wartime years.

The RM series was a new design, because air raids on Coventry destroyed the patterns of dies for the pre-war models.

Riley RMA

10,504 produced. The RMA was the first post-war Riley. It was announced in August 1945 with the news it would become available in the autumn. It used the 1.5 L engine and was equipped with hydro-mechanical brakes and an independent suspension using torsion bars in front. The body frame (not to be confused with the chassis) was made of wood in the English tradition, and the car featured traditional styling. The car was capable of reaching 75 mi/h. The RMA was produced from 1945 until 1952 when it was replaced by the RME.

Riley RMB

6,900 produced The 2.5 L (2443 cc) RMB was a lengthened RMA launched a year later in 1946.

It used the 2.5 L (2443 cc) "Big Four" engine with twin SU carburettors, starting with 90 hp (67 kW) but increasing to 100 hp (75 kW) for 1948 with a 95 mi/h top speed.

The wheelbase was 6.5 in longer and the overall length was a full 7 in longer. The RMB was replaced by the RMF for 1952.

The RMB 2½ Litre models have light blue bonnet and bootlid badges, differentiating them from the RMA 1½ Litre models which have dark blue badges.

A car tested by The Motor magazine in 1949 had a top speed of 90 mph and could accelerate from 0–60 mph in 16.8 seconds. A fuel consumption of 19.6 mpgimp was recorded. The test car cost £1224 including taxes.

Riley RMC

507 produced The RMC (Roadster) was an open 2-door, single bench seat, 2/3-seater version of the RMB, with a large rear deck area and fold-flat windscreen. Announced in March 1948, it was delivered to Geneva just too late to be exhibited at the Geneva Motor Show. Primarily designed for the North American export market, it was normally built with left-hand drive, with the gear change lever on the steering column. The bonnet and radiator were lowered and the bonnet catches were arranged to be operated internally. Extra over-riders were fitted to the bumpers and the fuel tank was enlarged to 20 impgal.

Eighteen months later, in September 1949, Riley announced future production would include a small quota of cars with right-hand drive. Riley attributed that to a slight increase in the supply of steel.

Instead of side windows it was supplied with flexible celluloid-glazed side curtains with a hole for hand signals and, when deployed, flimsy synthetic roofing over a light metal frame. It shared that car's 2.5 L 100 hp engine, and could reach 100 mph.

Just over 500 were built from 1948 until 1951.

Both the back and front of the car bear a remarkable likeness to a 1934 Ford V8.

Riley RMD

502 produced The RMD (drophead) is a traditional 2-door cabriolet, and was the last Riley cabriolet. It uses the same 2.5 L 100 hp engine as the RMB, on which it was based. Just over 500 were produced between 1949 and 1951.

This model was first displayed in October 1948 at London's Earls Court Motor Show.

Riley RME

3446 produced Launched in 1952, the RME was an improved RMA. It uses the same 1.5 L four-cylinder engine, and has a fully hydraulic braking system. The body has a larger rear window, with curved glass. To improve acceleration, the rear axle ratio was changed from 4.89:1 to 5.125:1.

When the 2.5 L (2443 cc) RMF ended production in October 1953, many details of the RME were revised. These included dispensing with running boards, and introducing entirely re-shaped front mudguards.

The RME was discontinued in 1955. It was succeeded in 1957 by the Riley One-Point-Five, which had been designed as a replacement for the Morris Minor, but never launched as such. This is a BMC design, unrelated to the RM series. It is much shorter than the RME, and was also badge-engineered as the Wolseley 1500, and in Australia as the Morris Major and Austin Lancer.

An RME tested by The Motor magazine in 1952 had a top speed of 75 mph and could accelerate from 0 to 60 mph in 29.5 seconds. A fuel consumption of 24.2 mpgimp was recorded. The test car cost £1,339 including taxes.

Riley RMF

1050 produced The RMF replaced the RMB in 1952. It has the same 2.5 L Big Four engine, plus mechanical updates shared with the RME. RMF 2½ Litre models have light blue bonnet and boot-lid badges, whereas the RME 1½ Litre models have dark blue badges. In 1953 the RMH Riley Pathfinder replaced the RMF. This is the last car built with the Riley Big Four engine, and is thus considered to be the last "real" Riley by purists. It continued in production until 1957.

Riley 2½-litre Big Four engine

The Big Four engine is a four cylinder 2.5 litre engine rated at 16.07 h.p. under the British RAC formula. It was designed in a matter of months, under difficult financial conditions, and announced in the summer of 1937. It followed existing Riley practice, similar to their 1.5 litre engine, but with each cylinder completely surrounded by a water jacket. The fully counter-weighted and balanced crankshaft ran in three main bearings. Pre-war power output was at first 80 bhp, then raised to 85 bhp. In its final Riley Pathfinder form, it developed 110 bhp, and was produced until the end of Riley Pathfinder production in February 1957. Tax rating 16hp

Bibliography

References

OED Online. Oxford University Press, December 2015. Web. 13 January 2016.

• HEAD A (folding) cover or canopy for a carriage or (in later use) motor vehicle, usually one which forms a permanent part of the vehicle rather than being detachable. Cf. drop-head
• CABRIOLET A motor car with fixed sides and a folding top.

References

1. "British car brochures www.car-brochures.eu — Riley adverts".
2. . (28 November 1945). "The New Riley". *[[The Manchester Guardian]] (1901-1959)*.
3. . "200,000 Cars in 12 months: Motor Trade's Plans Fifty percent for export". *[[The Manchester Guardian]] (1901-1959)*.
4. . (24 November 1936). "Cars of To-Day". *[[The Times]]*.
5. . (24 August 1945). "City Notes". *[[The Times]]*.
6. . (1949). "The Riley 2.5-litre Road Test".
7. . ["Riley 2½-Litre RMC"](https://www.classicandsportscar.com/guides/classic-cars-a-to-z/riley-2%C2%BD-litre-rmc).
8. Malpas, Rob. "Frequently Asked Questions".
9. . (31 March 1948). "News in Brief". *[[The Times]]*.
10. . (9 September 1949). "Nuffield Cars For Motor Show". *[[The Times]]*.
11. . (26 October 1948). "New Nuffield Cars". *[[The Times]]*.
12. (1994). "A-Z of Cars 1945-1970". Bay View Books.
13. . (10 December 1952). "The Riley 1.5 Litre Road Test".
14. Birmingham, Dr. Anthony Terence. (1 January 1965). "Riley: The Production and Competition History of the Pre-1939 Riley Motor Cars". G. T. Foulis and Co. Ltd..
15. (2017). "Wolseley Six-Ninety: A Super Profile". Wolseley Register.
16. . (16 March 1937). "Cars of To-Day". *[[The Times]]*.
17. Malpas, Rob. "Healey Silverstone. (1949–51)".