BMW automotive engine families listed as M40. Specifications below retain the source's separate family and variant labels.
Family specifications
BMW M40 engine
| Field | Reported value |
|---|---|
| Manufacturer | BMW |
| Production | 1987–1994 |
| Configuration | Naturally aspirated straight-4 |
| Displacement | 1.6 L (1,596 cc) 1.8 L (1,796 cc) |
| Cylinder bore | 84 mm (3.31 in) |
| Piston stroke | 72 mm (2.83 in) 81 mm (3.19 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | SOHC |
| Fuel system | Fuel injection |
| Management | Bosch Motronic 1.3 or 1.7 |
| Fuel type | Petrol |
| Cooling system | Water cooled |
| Predecessor | BMW M10 |
| Successor | BMW M43 |
Variant specifications
Versions
| Version | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| M40B16- E30 version | 1,596 cc (97.4 cu in) | 73 kW (99 PS; 98 hp) at 5,500 rpm | 141 N⋅m (104 lb⋅ft) at 4,250 rpm | 1987 |
| M40B16- E36 version | 1,596 cc (97.4 cu in) | 75 kW (102 PS; 101 hp) at 5,500 rpm | 143 N⋅m (105 lb⋅ft) at 4,250 rpm | 1991 |
| M40B18- E30 version | 1,796 cc (109.6 cu in) | 83 kW (113 PS; 111 hp) at 5,500 rpm | 162 N⋅m (119 lb⋅ft) at 4,250 rpm | 1987 |
| M40B18- E36 version | 1,796 cc (109.6 cu in) | 85 kW (116 PS; 114 hp) at 5,500 rpm | 165 N⋅m (122 lb⋅ft) at 4,250 rpm | 1991 |
BMW automotive engine directory
Data adapted from the cited Wikipedia revision by Wikipedia contributors under CC BY-SA 4.0. Production dates and fitments reflect that revision; verify the exact engine code, market and vehicle before applying a specification.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- Wikipedia: List of BMW engines. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1382309748; accessed 2026-11-10.
- Wikipedia: BMW M40. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1347952073; accessed 2026-11-10.