| BMW N42 engine | |
| Production: | 2001 - 2004 |
| Configuration: | Inline-4 |
| Head: | Aluminium |
| Block: | Aluminium |
| Valvetrain: | DOHC, with VVT & VVL |
| Fueltype: | Petrol |
| Bore: | 842NaN2 |
| Predecessor: | BMW M43 |
| Successor: | BMW N46 |
The BMW N42 is a DOHC four-cylinder petrol engine which replaced the BMW M43 and was produced from 2001-2004.[1] [2]
The N42 serves as the basis for the smaller N40 engine (which does not have Valvetronic).
The N42B18 won the 1.4-1.8 L category of the International Engine of the Year awards for 2001.[3]
In 2004, the N42 was replaced by the BMW N46 four-cylinder engine.
Compared with its M43 predecessor, the N42 features a DOHC valvetrain, VANOS (variable valve timing) and an aluminium engine block.[4] It was the first BMW engine to have Valvetronic (variable valve lift).[5] [6]
| Version | Displacement | Power | Torque | Year | |
|---|---|---|---|---|---|
| N42B18 | 17961NaN1 | 850NaN0 at 5,500 rpm | 1750NaN0 at 3,750 rpm | 2001-2004 | |
| N42B20 | 19951NaN1 | 1050NaN0 at 6,000 rpm | 2000NaN0 at 3,750 rpm | 2001-2004 |
The N42B18 has a displacement of 17961NaN1, uses Bosch Motronic ME9.2 engine management[7] and
Applications:
The N42B20 has a displacement of 19951NaN1, The N42B20 revs to 6600 rpm
Applications:
| BMW N40 engine | |
| Production: | 2001 - 2004 |
| Configuration: | Inline-4 |
| Displacement: | 1596cc |
| Bore: | 842NaN2 |
| Stroke: | 722NaN2 |
| Block: | Aluminium |
| Head: | Aluminium |
| Valvetrain: | DOHC, with VVT |
| Fueltype: | Petrol |
| Predecessor: | BMW M43 |
| Successor: | BMW N45 |
The BMW N40 is a DOHC four-cylinder petrol engine which replaced the 1.6 litre versions of the BMW M43.[8] 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 based on the BMW N42 engine and uses the same crankcase, pistons and bore size of 841NaN1. The redline is 6,500 rpm.
Unlike the N42, the N40 does not have Valvetronic (variable valve lift). The other major difference is a 91NaN1 reduction in stroke to 721NaN1, which results in a smaller displacement than the N42.