Engine Mitsubishi 4A91

The Japanese company has been assembling the 1.5-liter Mitsubishi 4A91 gasoline engine since 2004 and putting it on such popular models as the Colt and Lancer, as well as many Chinese cars. This power unit was created as part of a joint venture with Daimler-Chrysler.

The 4A9 family also includes engines: 4A90 and 4A92.

The engine was installed on:

  • Mitsubishi Colt Z30 in 2004 – 2013;
  • Mitsubishi Lancer CY in 2007 – 2017;
  • Mitsubishi Xpander since 2017;
  • Smart Forfour in 2004 – 2006;
  • BAIC BJ20 since 2015;
  • Brilliance BS2 in 2008 – 2013.

Specifications

Production years since 2004
Displacement, cc 1499
Fuel system injector
Power output, hp 109
Torque output, Nm 145
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 75
Piston stroke, mm 84.8
Compression ratio 10.5
Features no
Hydraulic lifters no
Timing drive chain
Phase regulator MIVEC
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 4.0
Fuel type 92
Euro standards EURO 4/5
Fuel consumption, L/100 km (for Mitsubishi Lancer 2008)
— city
— highway
— combined
8.0
5.2
6.4
Engine lifespan, km ~225 000
Weight, kg 130

Disadvantages of the Mitsubishi 4A91 engine

  • Reliable in general, the unit is known for its oil burner already at a run of 100,000 km.
  • The cause of the burn in the occurrence of piston rings or wear of valve stem seals.
  • Sooner or later, this turns into oil starvation and cranking of the liners.
  • On long runs, leaks from the front crankshaft oil seal are regularly encountered.
  • Also, the o-ring between the manifold and the catalyst often burns out.

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