Mercedes-Benz M166 engine

Mercedes-Benz M166
Mercedes-Benz M166
Overview
Manufacturer	Mercedes-Benz
Production	1997 – 2005
Layout
Configuration	Inline-four engine
Displacement	1.4 L (1,397 cc); 1.6 L (1,598 cc); 1.9 L (1,898 cc); 2.1 L (2,084 cc);
Cylinder bore	80 mm (3.15 in) (M166 E14, E16); 84 mm (3.31 in) (M166 E19, E21);
Piston stroke	69.5 mm (2.74 in) (1.4 L engines); 79.5 mm (3.13 in) (1.6 L engines); 85.6 mm (3.37 in) (1.9 L engines); 94 mm (3.70 in) (2.1 L engines);
Block material	Aluminium alloy
Head material	Aluminium alloy
Valvetrain	SOHC 2 valves x cyl.
Compression ratio	11:1; 10.8:1 (1.9 L engines);
Combustion
Fuel system	Multipoint injection
Fuel type	Gasoline
Cooling system	Water cooled
Output
Power output	60–103 kW (82–140 PS; 80–138 hp)
Torque output	130–205 N⋅m (96–151 lb⋅ft)
Chronology
Successor	Mercedes-Benz M266 engine

Last updated December 27, 2022

The M166 is a range of inline-four engines produced by Mercedes-Benz from 1997 to 2005, before it was succeeded by the M266 engine from 2004.

Design

The M166 is transversely mounted and features 2 valves per cylinder with multipoint injection.^[1] The engine is used in W168 A-Class models that feature the 'sandwich concept', where the engine is mounted at a 59-degree angle just behind the front axle.^[2] This allows for better weight distribution as well as increased safety, as the engine slides underneath the floorpan instead of into the cabin in the event of a head-on collision.^[3]

Models

Engine	Displacement	Power	Torque	Years
M166 E14	1.4 L; 85.3 cu in (1,397 cc)	60 kW (82 PS; 80 hp) at 5,000 rpm	130 N⋅m (96 lb⋅ft) at 3,750 rpm	1997–2004
M166 E16 R	1.6 L; 97.5 cu in (1,598 cc)	60 kW (82 PS; 80 hp) at 5,000 rpm	140 N⋅m (103 lb⋅ft) at 2,500 rpm	1997–2005
M166 E16	1.6 L; 97.5 cu in (1,598 cc)	75 kW (102 PS; 101 hp) at 5,250 rpm	150 N⋅m (111 lb⋅ft) at 4,000 rpm	1997–2005
M166 E19	1.9 L; 115.8 cu in (1,898 cc)	92 kW (125 PS; 123 hp) at 5,500 rpm	180 N⋅m (133 lb⋅ft) at 4,000 rpm	1999–2005
M166 E21	2.1 L; 127.2 cu in (2,084 cc)	103 kW (140 PS; 138 hp) at 5,500 rpm	205 N⋅m (151 lb⋅ft) at 4,000 rpm	2002–2004

M166 E14

1997–2004 W168 A140 ^[4]

M166 E16

2001–2005 W639 Vito 1.6
1997–2004 W168 A160

M166 E19

1999–2004 W168 A190
2001–2005 W639 Vito 1.9
2001-2005 W414 Vaneo 1.9

M166 E21

2002–2004 W168 A210

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References

↑ "Mercedes-Benz M166 and M266 engines". australiancar.reviews. Retrieved 2018-07-06.
↑ Popa, Bogdan (2009-04-23). "How Mercedes' Sandwich Concept Works". autoevolution. Retrieved 2018-07-06.
↑ "Mercedes cuts sandwich but B-class still tempts appetite". The National Business Review. 2012-04-14. Retrieved 2018-07-06.
↑ "AustralianCar.Reviews: #1 for Reviews and Used Car Valuations". australiancar.reviews. Retrieved 2018-07-06.

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[1] "Mercedes-Benz M166 and M266 engines". australiancar.reviews. Retrieved 2018-07-06.

[2] Popa, Bogdan (2009-04-23). "How Mercedes' Sandwich Concept Works". autoevolution. Retrieved 2018-07-06.

[3] "Mercedes cuts sandwich but B-class still tempts appetite". The National Business Review. 2012-04-14. Retrieved 2018-07-06.

[4] "AustralianCar.Reviews: #1 for Reviews and Used Car Valuations". australiancar.reviews. Retrieved 2018-07-06.

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