BMW N40 Straight-4 Engine
From 2001 to 2004
The BMW N40 is an straight-4 DOHC engine which replaced the 1.6 litre versions of the M43. It was produced from 2001-2004 and only sold in several countries, where taxes favoured cars with smaller displacement engines. The N40 was replaced by the BMW N45.
The N40 is a four-cylinder naturally aspirated engine from the car manufacturer BMW with 16 valves. This replaced the BMW M43 . The BMW N40 was developed specifically for sales markets with special displacement control and in parallel with the N42 . So z. For example, the cylinder-crankcase together with the piston of these motors identical, as the cylinder bore of 84 mm is the same. The different displacements are generated by another stroke. Unlike the N42 , the N40 does not have the Valvetronic system.
Design
The N40 is based on the N42 and uses the same crankcase, pistons and bore size of 84 mm (3.3 in).
The differences compared with the N42 include a 9 mm (0.4 in) reduction in stroke length (which results in the smaller displacement) and the N40 does not have Valvetronic.
Models
| Engine | Displacement | Bore × Stroke | Power | Torque | Redline | Years |
|---|---|---|---|---|---|---|
| N40B16 | 1,596 cc (97 cu in) | 84 mm × 72 mm | 85 kW (114 hp) @ 6100 rpm | 150 N·m (111 lb·ft) @ 4300 rpm | 6500 | 2001–2004 |
Applications:
- 2001-2005 E46 316i/316ci/316ti (certain markets only)
- 07 / 2003-02 / 2004 in the BMW E46 as a 316ci Coupe
- 07 / 2003-02 / 2004 in BMW E46 as 316ti Compact
- 07 / 2003-02 / 2004 in the BMW E46 as 316i
Technical
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BMW N40 Engine Technical details and specifications (2001-2004)
BMW 1.6 Engine type: N40
No. of cylinders 4/DOHC
Capacity 1596 cc
Firing order 1-3-4-2
Compression ratio 10.25:1
Ignition/Fuel system Make Bosch Motronic ME9.2
Oil pressure 1.0 bar© Motor car History
