Calthorpe Motor Cycle Company (1909-1939)
 
 
Typ / Model Production time Capacity Cylinders / Engine Power Serial no. Top speed  
 
3.5 HP White and Poppe SV 1910   1 cyl., side valves, White and Poppe 3½ PS    
 
3.5 HP JAP SV 1910   1 cyl., side valves, JAP 3½ PS    
 
3.5 HP Precision SV 1910-1913 499 cm³ 1 cyl. (85 x 88 mm), side valves, Precision 3½ PS    
 
New Lightweight 1911-1912   1 cyl., side valves      
 
3.5 HP Precision SV Touring 1911 511.2 cm³ 1 cyl. (86 x 88 mm), side valves, Precision 3½ PS    
 
3.5 HP Precision SV TT 1911 511.2 cm³ 1 cyl. (86 x 88 mm), side valves, Precision 3½ PS    
 
3.5 HP Precision OHV TT 1913 499 cm³ 1 cyl. (85 x 88 mm), ohv, Precision 3½ PS    
 
3.5 HP Green Precision water cooled OHV 1913 499 cm³ 1 cyl. (85 x 88 mm), side valves, watercooled, Precision 3½ PS    
 
4.25 HP Precision SV 1913 610.7 cm³ 1 cyl. (90 x 96 mm), side valves, Precision 4¼ PS    
 
6 HP Precision V-Twin SV 1913 751 cm³ 2 cyl. (75 x 85 mm), side valves, V-Twin, Precision 5-6 PS    
 
3.5 HP Standard Touring 1914 499 cm³ 1 cyl. (85 x 88 mm), side valves, F.E.Baker 3½ PS    
 
4 HP Precision V-Twin Standard Touring 1914 497.6 cm³ 2 cyl. (60 x 88 mm), side valves, V-Twin 60°, Precision 4 PS    
 
1916 Calthorpe ladies 1916 243.3 cm³ 1 cyl. (67 x 69 mm), 2 stroke 2¼ PS    
 
1916 Twin Lightweight Combination 1916 496.4 cm³ 2 cyl. (70 x 64.5 mm), side valves, V-Twin, JAP 4 PS    
 
D.6.A Sports 1927 348.4 cm³ 1 cyl. (74 x 81 mm), 4 stroke, ohv 3½ PS    
 
D.6.S OHV Super Sports 1927-1928 348.4 cm³ 1 cyl. (74 x 81 mm), 4 stroke, ohv 3½ PS    
 
G.1 1927-1929 498.8 cm³ 1 cyl. (84 x 90 mm), 4 stroke, ohc 5 PS    
 
1928 ohv Popular 1928-1929 348.4 cm³ 1 cyl. (74 x 81 mm), 4 stroke, ohv 3½ PS    
 
1928 "Speedway Special" 1928 348.4 cm³ 1 cyl. (74 x 81 mm), 4 stroke, ohv 20 PS (6.500 rpm)    
 
Ivory 250 "Minor" 1930-1939 246.8 cm³ 1 cyl. (67 x 70 mm), ohv, Twin Port, Villiers patent      
 
Ivory 350 "Junior" 1929-1939 348.4 cm³ 1 cyl. (74 x 81 mm), ohv, Twin Port 16 PS (5.200 rpm)    
 
Ivory 500 "Major" 1932-1939 493.8 cm³ 1 cyl. (85.5 x 86 mm), ohv, Twin Port 22 PS (5.200 rpm)   110 km/h

 
Special Competition 1936-1938 493.8 cm³ 1 cyl. (85.5 x 86 mm), ohv, Twin Port      
 
Ivory 350 1937 350.1 cm³ 1 cyl. (72 x 86 mm), ohv, Twin Port