BMW N45
The BMW N45 is a naturally aspirated four-cylinder petrol engine which replaced the BMW N40 and was produced from 2004-2011.[1] It was produced alongside the BMW N46 engine and only sold in several countries, where vehicle taxes favoured small-displacement engines.
| BMW N45 engine | |
|---|---|
| Overview | |
| Production | 2004-2011 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 1.6–2.0 L (98–122 cu in) |
| Block material | Aluminium |
| Head material | Aluminium |
| Valvetrain | DOHC, with VVT |
| Combustion | |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | BMW N40 |
| Successor | BMW N43 |
The N45 is based on the N46, however it does not have Valvetronic (variable valve lift).[2] As per the N42 and N46, the N45 has double-VANOS (variable valve timing).[1] In 2007, the N45 was updated, which was called the N45N.
In 2007, the N45's successor - the BMW N43 - was introduced. However, the direct-injected N43 was not sold in countries with high-sulfur fuel, so the N45 continued to be produced alongside the N43. The N45 was phased out as new generation vehicles were released with the turbocharged BMW N13 four-cylinder engine.
Models
| Engine | Displacement | Power | Torque | Years |
|---|---|---|---|---|
| N45B16 | 1,596 cc (97.4 cu in) | 85 kW (114 bhp) at 6,000 rpm | 150 N⋅m (111 lb⋅ft) at 4,300 rpm | 2004-2011 |
| N45B20S | 1,997 cc (121.9 cu in) | 130 kW (174 bhp) at 7,000 rpm | 210 N⋅m (155 lb⋅ft) at 4,250 rpm | 2006 |
N45B20S
The N45 was enlarged to 1,997 cc (121.9 cu in), to homologate the E90 320si for the World Touring Car Championship.[3] The N45 was chosen over the N46, because its lack of variable valve lift allows higher engine speeds.
Applications:
- 2006 E90 320si (Limited production model)
See also
References
- "Engine specifications for N45 engines". www.bmwheaven.com. Retrieved 3 June 2012.
- "BMW 116i now powered by 2.0L N46 Valvetronic". www.paultan.org. Retrieved 3 June 2012.
- "BMW 320si – A real driver's car". www.bmwblog.com. Retrieved 14 April 2017.