BMC B-series engine
| B-series engine | |
|---|---|
| Overview | |
| Manufacturer | BMC | 
| Designer | Leonard Lord, John Rix, Eric Bareham | 
| Production | 1954–1986 | 
| Layout | |
| Configuration | Inline-4 and Inline-6 | 
| Displacement | 
 | 
| Cylinder bore | 
 | 
| Piston stroke | 89 mm (3.5 in) | 
| Cylinder block material | Cast iron | 
| Cylinder head material | 
 | 
| Valvetrain | OHV, Twin-Cam | 
| Compression ratio | 8.3:1-9.9:1 | 
| Combustion | |
| Fuel system | Single or twin carburettors | 
| Fuel type | Petrol & Diesel versions | 
| Cooling system | Water-cooled | 
| Output | |
| Power output | 39–108 bhp (29–81 kW) | 
| Torque output | 64 lb⋅ft (87 N⋅m) | 
| Chronology | |
| Predecessor | BMC A-Series engine | 
| Successor | |
The BMC B series is a line of straight-4 & straight-6 internal combustion engine mostly used in motor cars, created by British automotive manufacturer Austin Motor Company.