Martinsyde Ltd. (1908-1922); BAT Martinsyde (1923-1925)
 
 
Typ / Model Production time Capacity Cylinders / Engine Power Serial no. Top speed  
 
Model A 1919-1922 346 cm³ 1 cyl. (70 x 90 mm), 4 stroke, exhaust-over-inlet / overhead-exhaust-valve      
 
Model C
"Sports"
1920-1922 498 cm³ 2 cyl., 4 stroke, exhaust-over-inlet, V-twin 50°      
 
Model D
"Quick Six"
1922 739 cm³ 2 cyl., 4 stroke, side valves, V-twin 50° 22 PS   128 km/h