The Mitsubishi 4M4 engine is a range of four-cylinder diesel piston engines from Mitsubishi Motors, first introduced in the second generation of their Montero/Pajero/Shogun SUVs. They superseded the previous 4D5 engine family, main differences are enlarged displacements and the utilization of one or two over-head camshafts. Originally available only as a 2835 cc intercooled turbo, detail improvements in 1996 and a larger 3.2 litre option in 1999 served to improve power, torque, fuel economy and emissions. The final version has 3.0 litres swept volume and Common rail direct injection.

4M40

Inline 4-cylinder SOHC, bore x stroke = 95 x 100 mm, 2835 cc, swirl combustion chamber

Naturally aspirated

Compression ratio 21.0:1, Zexel Distributor type injection pump, 59 kW at 4000 rpm, 198 Nm at 2000 rpm Applications:

Intercooled turbo gen 1

Compression ratio 21.0:1, 92 kW at 4000 rpm, 294 Nm at 2000 rpm Applications:

Intercooled turbo gen 2

Compression ratio 21.0:1, Zexel Electronically controlled or Mechanical controlled distributor type Injection Pump, 103 kW at 4000 rpm, 314 Nm at 2000 rpm Applications:

4M41

Inline 4-cylinder DOHC 16 valve, Bore x Stroke 98.5 x 105 mm, 3200 cc

Intercooled turbo

Compression ratio 17.0:1, Zexel Electronic control type distributor type pump (direct injection inside diesel tube) or Denso Common Rail direct injection, 121 kW at 4000 rpm, 351 Nm at 2000-3000 rpm Applications:

Variable geometry intercooled turbo

Compression ratio 17.0:1 or 16.0:1, Denso Common Rail Direct Injection Applications:

4M42

Inline 4-cylinder DOHC 16 valve, Bore x Stroke 95 x 105 mm, 2977 cc, direct injection OAT, Applications: CR, Applications: