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The 3½ Litre (and later 4¼ Litre) was presented to the public in September 1933, shortly after the death of Henry Royce, and was the first new Bentley model following Rolls-Royce's acquisition of the Bentley brand in 1931.
Bentley sold only the bare chassis with scuttle radiator and grille for coachbuilders to construct on it a body to the buyer's requirements. Any amendment to those provided features was most unlikely to be sanctioned by Bentley. Many distributors ordered their preferred bodies as showroom stock ready for immediate sale.
Bentleys of this era are Derby Bentleys because they were built in the Rolls-Royce factory located in Derby, England. Those of Bentley's previous independent era are Cricklewood Bentleys.
Market
From the outset, the car was intended to compete on quality and grace rather than sporting reputation which had been the cornerstone of the pre-1931 Bentley company. The cars retained the famous curved radiator shape based on earlier Bentley models, but in all meaningful respects they were clearly Rolls-Royces. Although disappointing some traditional customers, they were well received by many others and even W.O. Bentley himself was reported as saying that he would "rather own this Bentley than any other car produced under that name." The Rolls-Royce Engineer in charge of the development project, Ernest Hives (later Lord Hives), underlined the Rolls-Royce modus operandus in a memo addressed to company staff "our recommendation is that we should make the car as good as we know how and then charge accordingly." At a time when the Ford 8 could be purchased new for £100, an early Bentley 3½ Litre cost around £1,500 (equivalent to £5.26 thousand vs. £78.9 thousand today)[1], putting it beyond the reach of all but the wealthiest consumers. Despite not being a car of remarkable outright performance, the car's unique blend of style and grace proved popular with the inter-war elite and it was advertised under the legend the silent sports car. Over 70% of the cars built between 1933 and 1939 were said to have still been in existence 70 years later.[2] Although chassis production ceased in 1939, a number of cars were still being bodied and delivered during 1940. The last few were delivered and first registered in 1941.
Racing
The Derby Bentley was not intended to be used as a racing car, unlike the earlier, pre-Rolls-Royce, cars built by W.O. Bentley. However, some examples were used for competition at an international level, including:
A 3½-Litre (later 4¼-Litre) raced by E.R. Hall in the RAC Tourist Trophy (TT) in Ulster in 1934, 1935 and 1936. It was the first competition car built at Rolls-Royce since the car built for Charles Rolls which he had driven to win the 1906 TT, and it was also their last.
Hall also raced the 4¼-Litre car at Le Mans in 1950, becoming the first man to drive solo for the entire distance of the race.
A 4¼-Litre with a streamlined-body by Pourtout of Paris for Greek racing driver A.M. Embiricos set a record of 115.05 mph (185.16 km/h) at Brooklands.
The Embiricos car also raced at Le Mans in 1949, 1950 and 1951 becoming the first car ever to have finished that event three years in succession.
3½-litre fixed head coupé
by Bertelli of Feltham 1935
3½-litre coupé de ville
by Thrupp & Maberly 1934
3½ Litre
Based on an experimental Rolls-Royce project "Peregrine" which was to have had a supercharged 2¾ L engine, the 3½ Litre was finally fitted with a less adventurous engine developed from Rolls' straight-6 fitted to the Rolls-Royce 20/25. The Bentley variant featured a higher compression ratio, sportier camshaft profile and two SU carburettors on a crossflow cylinder head. Actual power output was roughly 110 bhp (82 kW) at 4500 rpm, allowing the car to reach 90 mph (145 km/h). The engine displaced 3.7 L (3669 cc/223 in³) with a 3¼ in (82.5 mm) bore and 4½ in (114.3 mm) stroke.
A 4-speed manual transmission with synchromesh on 3rd and 4th, 4-wheel leaf spring suspension, and 4-wheel servo-assisted mechanical brakes were all common with other Rolls-Royce models. The chassis was manufactured from nickel steel, and featured a "double-dropped" layout to gain vertical space for the axles and thus keep the profiles of the cars low. The strong chassis needed no diagonal cross-bracing, and was very light in comparison to the chassis built by its contemporary competitors, weighing in at 2,510 pounds (1,140 kg) in driveable form ready for delivery to the customer's chosen coachbuilder.
1177 3½ Litre cars were built, with about half of them being bodied by Park Ward, with the remainder "dressed" by other coachbuilders like Barker, Freestone & Webb, Gurney Nutting, Hooper, Mann Egerton, Mulliner (both A and HJ), Rippon, Thrupp & Maberly, James Young, Vanden Plas and Windovers in England; Figoni, Kellner, Saoutchik and Vanvooren in Paris; and smaller concerns elsewhere in UK and Europe.
A drophead 3½ Litre was featured in the 1963 movie From Russia with Love.[3]
4¼-litre 4-door sports saloon 1936
4¼-litre fixed head coupé 1939
by Pourtout of Paris for André Embiricos
4¼ Litre
Beginning in March, 1936, a 4¼ Litre version of the car was offered as replacement for the 3½ Litre, in order to offset the increasing weight of coachwork and maintain the car's sporting image in the face of stiff competition. The engine was bored to 3½ in (88.9 mm) for a total of 4.3 L (4257 cc/259 in³). From 1938 the MR and MX series cars featured Marles steering and an overdrive gearbox. The model was replaced in 1939 by the MkV, but some cars were still finished and delivered during 1940-1941.
1234 4¼ Litre cars were built, with Park Ward remaining the most popular coachbuilder. Many cars were bodied in steel rather than the previous, more expensive, aluminium over ash frame construction.
A Drophead 4¼ Litre was featured as James Bond's car in the 1983 movie Never Say Never Again[4].
Famous first owners
Woolf Barnato, racing driver & former Bentley chairman (B121AE, B2DG, B6GA, B121GP)
Prince Bira, racing driver (B29GP)
Sir Malcolm Campbell, nine times World Land Speed Record holder (B141AE, B206GA, B22GA)
Billy Cotton, bandleader (B125DG)
George Eyston, three time World Land Speed Record holder (B24DG, B82GA)
E.R. Hall, racing driver and winter olympian (B35AE, B106GA, B216GA)
Raymond Mays, racing driver (B125DG, B24GA, B144LS)
Robert Montgomery, actor (B63DK)
Bernard Rubin, racing driver (B109CW)
