Calthorpe cars
British historical manufacturer of cars, motorcycles, and bicycles.
Last updated August 25, 2026
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Overview
Calthorpe was a Birmingham-based British manufacturing marque associated with cars, motorcycles, and bicycles during the first half of the twentieth century. Its roots lay in the bicycle trade of the 1890s, when George W. Hands operated a Birmingham bicycle business known as Hands and Cake. The enterprise was renamed the Bard Cycle Manufacturing Company in 1897 and the Minstrel Cycle Company in 1901. It subsequently became the Minstrel and Rea Cycle Company, while the Calthorpe Motor Company emerged from the same industrial and commercial network. The company announced its first motor car in 1904, a 10 hp four-cylinder model. Early cars used engines supplied by outside specialists, including Alpha units produced by Johnson, Hurley and Martin of Coventry. Calthorpe developed a reputation in the light-car market, although it also made larger cars for limited periods. The 16-20, introduced in 1907, was an important early model. It used a four-cylinder engine of approximately 2.8 litres in its initial specification and incorporated features such as a Hele-Shaw clutch, live-axle transmission, and a transverse spring intended to improve body stability on poor roads. The model performed well in reliability trials and other motoring events in 1907 and 1908. By the years immediately before the First World War, Calthorpe was concentrating increasingly on lighter and more accessible cars. The company used proprietary engines from suppliers such as White and Poppe and achieved sporting publicity through participation in French Coupe de l'Auto events. Its 10 hp Minor, announced for the 1914 season, was designed as a compact car with the equipment and proportions of a larger automobile, including a three-speed gearbox and shaft drive. After the war, Calthorpe discontinued its larger pre-war types and revived the Minor with a 1,261 cc engine. Production ambitions were substantial: in 1920, the company reportedly aimed to build as many as 50 cars per week. Coachwork was supplied by Mulliners, a subsidiary acquired by Calthorpe in 1917, whose adjacent facilities supported the marque's emphasis on well-finished bodies. Calthorpe also maintained a presence in sporting motoring, including appearances at Brooklands by drivers such as Woolf Barnato. The company encountered financial difficulties during the 1920s. A receiver was appointed in 1924 and the Bordesley Green factory closed, although restricted production and the sale of existing stock continued. George Hands temporarily departed in 1922 to establish the Hands marque at the Calthorpe motorcycle works, returning to Calthorpe in 1924. During this period, a six-cylinder overhead-camshaft engine associated with Hands was briefly installed in the 12/20 model. Calthorpe's final major automobile initiative was the 15/45, a six-cylinder, two-litre car introduced in 1925, but the market for relatively expensive high-quality light cars was already weakening. Sales of remaining cars had largely ended by about 1928, and total post-war car production has been estimated at roughly 5,000 vehicles, with pre-war output uncertain. The wider Calthorpe enterprise continued in motorcycles after car production declined. Motorcycle manufacturing began around 1909 and used engines from several suppliers, including White and Poppe, Precision, J.A.P., and Peco. In the late 1920s the Ivory Calthorpe range introduced a Calthorpe-designed single-cylinder sloper engine. These motorcycles were marketed principally through London dealer Pride & Clark and remained in production into the late 1930s. After the works were sold in 1939, equipment was moved to Bristol and a few motorcycles using Matchless engines were built before the Second World War halted the effort. Production did not resume after the war, and the equipment was later sold to DMW. Fewer than ten Calthorpe cars are believed to survive.
History
Calthorpe developed from Birmingham's bicycle industry rather than beginning as a standalone automobile venture. George W. Hands operated a bicycle business called Hands and Cake during the 1890s. The business became the Bard Cycle Manufacturing Company in 1897 and then the Minstrel Cycle Company in 1901. The Minstrel organization later became the Minstrel and Rea Cycle Company, while the Calthorpe Motor Company was established within the same broader enterprise. The companies occupied premises in Barn Street, Birmingham, and were affected by a serious fire in June 1905. By 1909, car manufacturing had moved to a factory on Cherrywood Road in Bordesley Green. Calthorpe's first announced car appeared in 1904. It was a 10 hp four-cylinder model, and early production relied partly on engines from Johnson, Hurley and Martin's Alpha Works in Coventry. The relationship with that supplier later became the subject of a dispute concerning ownership of engine-block casting patterns. Calthorpe's 16-20, introduced in 1907, became one of its better-known early cars. The model was shown at the Olympia motor show and used a four-cylinder engine, Hele-Shaw clutch, live-axle drive, and a transverse spring to help steady the body. Its results in reliability trials and motoring events helped establish the company in the light-car field. During the following season the engine specification was revised, including an increase in stroke and an apparent transition away from Alpha power units. The company experimented with larger cars, but its commercial emphasis increasingly fell on lighter automobiles. It used proprietary White and Poppe engines and gained sporting exposure in France through Coupe de l'Auto competition. The 10 hp Minor was announced for the 1914 season as a compact but substantial car, equipped with a three-speed gearbox and shaft drive. After the First World War, Calthorpe abandoned its larger types and brought back the Minor with a somewhat enlarged 1,261 cc engine. Calthorpe Motor Co (1912) Ltd was incorporated around November 1912. Its listed directors included Lord Teynham, Wilfrid Hill, Daniel Taylor, George W. Hands, and Harry Joyce. The post-war business sought to increase output, with J. Mathews overseeing production in 1920 and a reported target of 50 cars per week. The marque's presentation benefited from coachwork supplied by Mulliners, a subsidiary acquired in 1917. The adjacent coachbuilding operation helped Calthorpe offer bodies positioned above the most basic economy-car market. Sporting activity also continued, including participation at Brooklands by Woolf Barnato and other drivers. The business nevertheless struggled as the economics of specialist light-car production deteriorated. George Hands left briefly in 1922 to establish the Hands car marque at the Calthorpe motorcycle factory in Barn Street. During this interval he developed a six-cylinder overhead-camshaft engine that was used for a short period in the Calthorpe 12/20. Hands returned to Calthorpe in 1924, the same year a receiver was appointed. The Bordesley Green factory closed, but limited manufacturing and the disposal of remaining vehicles continued. The 15/45, a two-litre six-cylinder model launched in 1925, represented a final attempt to compete with a more substantial car. It was introduced too late to reverse Calthorpe's decline. Sales of remaining cars had effectively ceased by about 1928. Around 5,000 cars are estimated to have been manufactured after the war, while pre-war production is not known with confidence. Calthorpe's motorcycle activity outlasted its automobile business. Motorcycles began to be produced around 1909, initially using engines from White and Poppe and later units from Precision, J.A.P., and Peco. In the late 1920s, the Ivory Calthorpe name was applied to motorcycles with a Calthorpe-built single-cylinder sloper engine. The launch version had a 348 cc overhead-valve, twin-port engine, a duplex frame, a three-speed Burman gearbox, Amal carburetion, and BTH magneto ignition. A 498 cc version followed by 1935, although performance remained broadly similar. Pride & Clark became the principal seller through its London dealership. When the motorcycle works and equipment were sold in 1939, Bruce Douglas moved the machinery to Bristol. A small number of motorcycles fitted with 347 cc and 497 cc Matchless engines were made, but the outbreak of the Second World War ended the initiative. Post-war motorcycle production did not resume, and the equipment was eventually sold to DMW. Calthorpe's surviving automobile population is very small, with fewer than ten cars thought to remain.
- 1939
Motorcycle equipment sold and moved to Bristol
[1]Bruce Douglas acquired the equipment and moved it to Bristol, where production soon stopped because of the Second World War.
- 1938
Motorcycle production continues until the late 1930s
[1]Calthorpe motorcycle production continued until approximately 1938, longer than the company's car manufacturing.
- 1928
Automobile sales largely cease
[1]Sales of remaining Calthorpe cars had virtually ended by this period.
- 1925
15/45 launched
[1]The company introduced the 15/45, a two-litre six-cylinder car, in an unsuccessful attempt to maintain its automobile business.
- 1924
Receiver appointed
[1]Financial problems led to the appointment of a receiver and closure of the Bordesley Green factory.
- 1917
Mulliners acquired
[1]Calthorpe acquired Mulliners, strengthening its access to in-house and adjacent coachbuilding capacity.
- 1913
10 hp Minor announced
[1]Calthorpe announced the Minor for the 1914 season as a compact shaft-driven car with a three-speed transmission.
- 1912
Calthorpe Motor Co (1912) Ltd incorporated
[1]A new company structure was incorporated with a board including Lord Teynham, Wilfrid Hill, Daniel Taylor, George W. Hands, and Harry Joyce.
- 1909
Car works moves to Bordesley Green
[1]Calthorpe's car manufacturing operation moved to Cherrywood Road in Bordesley Green, Birmingham.
- 1907
16-20 introduced
[1]The 16-20 entered the light-car market and gained favorable attention in reliability events.
Products and positioning
A Birmingham engineering marque focused primarily on well-equipped light cars, while also producing bicycles and motorcycles. Calthorpe competed through technical variety, proprietary and supplier-built engines, sporting participation, and comparatively high-quality coachwork.
Automobile · 1904
Calthorpe 10 hp
Calthorpe's first announced motor car, introduced in 1904. It was described as a 10 hp four-cylinder model and represented the company's transition from bicycle manufacturing into automobile production.
Light automobile · 1907
Calthorpe 16-20
Introduced in 1907, the 16-20 was a four-cylinder light car associated with Alpha engine supply in its early form. Its specification included a Hele-Shaw clutch, live-axle transmission, and a transverse spring intended to improve stability. The model gained recognition through reliability trials and motoring events in 1907 and 1908.
Light automobile · 1913
Calthorpe Minor
The Minor was announced for the 1914 season as a 10 hp compact car designed with the equipment and road-going character of a larger automobile. It used a three-speed gearbox and shaft drive. After the First World War, the model returned with a larger engine of approximately 1,261 cc and became the center of Calthorpe's post-war automobile program.
Automobile
Calthorpe 12/20
The 12/20 was one of Calthorpe's post-war models. For a short period it was fitted with a six-cylinder overhead-camshaft engine developed by George Hands during his temporary departure from the company. The model formed part of the marque's effort to offer more substantial performance while retaining its broader light-car identity.
Automobile · 1925
Calthorpe 15/45
Introduced in 1925, the 15/45 was a two-litre six-cylinder car and Calthorpe's final major automobile initiative. It arrived as demand for relatively expensive, high-quality light cars was weakening, and it did not prevent the decline of the automobile business.
Motorcycle
Ivory Calthorpe
The Ivory Calthorpe range appeared in the late 1920s and used a Calthorpe-built single-cylinder sloper engine. The launch motorcycle had a 348 cc overhead-valve twin-port engine, duplex cradle frame, three-speed Burman gearbox, Amal carburetor, and BTH magneto. A 498 cc version was offered by 1935, with quoted performance of roughly 70 mph.
Brand decisions
1939
Sell and relocate motorcycle manufacturing equipmentM&ABackground
The Calthorpe motorcycle works was sold after the marque's automobile business had already declined.
Action taken
Bruce Douglas acquired the equipment and moved it to Bristol, where a small number of Matchless-engined motorcycles were built.
Aftermath
The outbreak of the Second World War halted the new production effort. Motorcycle manufacturing did not resume after the war, and the equipment was later sold to DMW.
1925
Launch the 15/45 six-cylinder modelProduct launchBackground
Calthorpe sought to preserve a position in the automobile market as specialist light-car sales weakened.
Action taken
The company introduced the 15/45, a two-litre six-cylinder automobile.
Aftermath
The model was introduced too late to reverse the company's decline, and remaining car sales soon dwindled.
1924
Continue restricted operations after receivershipStrategyBackground
Declining sales and financial pressure led to the appointment of a receiver and closure of the Bordesley Green factory.
Action taken
Calthorpe ended normal factory operations but maintained limited production and sold remaining stock for a time.
Aftermath
Automobile sales had largely ceased by about 1928, despite the later introduction of the 15/45.
1917
Acquire Mulliners for coachbuilding capacityM&ABackground
Calthorpe needed dependable access to finished bodies for its automobile range and operated near Mulliners' facilities in Birmingham.
Action taken
The company acquired Mulliners, which subsequently supplied coachwork for Calthorpe cars.
Aftermath
The acquisition supported the marque's post-war emphasis on comparatively high-quality bodywork, although it did not prevent later financial decline.
Recent events
- 1939
Calthorpe motorcycle equipment is moved after the works sale[1]
M&A · Other
Bruce Douglas acquired the motorcycle equipment and moved it to Bristol, where only a small number of Matchless-engined motorcycles were produced before wartime stoppage.
- 1925
Calthorpe introduces the 15/45 six-cylinder car[1]
Product launch
The 15/45 was a two-litre six-cylinder model intended to sustain the marque, but arrived as demand for expensive light cars was declining.
- 1924
Receiver appointed as Calthorpe faces financial difficulties[1]
Bankruptcy
A receiver was appointed and the Bordesley Green factory closed, although limited production and stock clearance continued for a period.
- 1920
Calthorpe targets higher post-war production[1]
Other
Under production manager J. Mathews, the company set a reported objective of producing 50 cars per week while focusing on the revived Minor.
- 1917
Calthorpe expands its coachbuilding capability through Mulliners[1]
M&A
Calthorpe acquired Mulliners, whose adjacent factory supplied coachwork for the company's post-war automobiles.
- 1907
Calthorpe launches the 16-20 light car[1]
Product launch · Product generation
The 16-20 was presented as a four-cylinder car and achieved favorable results in reliability trials and other motoring events.
- 1904
Calthorpe announces its first motor car[1]
Product launch
The company introduced a 10 hp four-cylinder automobile, marking its move from bicycle manufacturing into car production.
Ivory Calthorpe motorcycle range is introduced[1]
Product launch · Product generation
The late-1920s Ivory Calthorpe range used a Calthorpe-built single-cylinder sloper engine and was distributed through Pride & Clark in London.
Sources1 sources
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