Difference between revisions of "4A9x family"

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The '''4A9x family''' of engines are inline 4 cylinder engines designed by Mitsubishi. All feature an all-alloy design with double overhead camshafts, [[MIVEC]] and four valves per cylinder.
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{{Infobox engine
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| name          = 4A9x
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| image        = [[Image:4A91.jpg|250px]]
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| caption      = 4A91 in a Colt (RG)
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| manufacturer  = MDC Power<br>Shenyang Aerospace Mitsubishi Motors Engine Manufacturing
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| aka          =
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| production    = 2003 - present
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| predecessor  = [[Orion|Orion (4G1x)]]
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| successor    = 
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| configuration = Inline 4
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| displacement  =
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| bore          =
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| stroke        =
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| block        = Aluminum die-cast
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| head          = Aluminum die-cast
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| valvetrain    = Direct acting DOHC, 16 valves, continuously variable MIVEC intake valve timing
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| compression  =
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| supercharger  =
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| turbocharger  =
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| fuelsystem    =
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| management    =
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| fueltype      =
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| oilsystem    =
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| coolingsystem =
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| idle          =
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| redline      =
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| power        =
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| specpower    =
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| torque        =
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| length        =
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| width        =
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| height        =
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| emissions level =
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}}
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The '''4A9x family''' was designed by Mitsubishi to replace the [[Orion]] engine in its small vehicles. Mitsubishi designed it to be lightweight, compact and powerful. All 4A9x engines feature an all-aluminium design with chain driven double overhead camshafts, four valves per cylinder (16 in total) and continuously variable [[MIVEC]] on the intake camshaft. It is the first Mitsubishi engine to use a high pressure die-cast aluminium block.
  
The engine is built at the joint Mitsubishi-DaimlerChrysler facility - [[MDC Power]] in Germany and has been available since 2003.
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The engine has been built at the joint Mitsubishi Daimler-Chrysler facility - [[MDC Power]] in Germany since 2003 and the Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co Ltd in China since 2009.
  
 
==4A90==
 
==4A90==
The 4G90 is a 1.3 litre engine displacing 1332cc. It has a 75.0 mm x 75.4 mm bore and stroke with a 10.5:1 compression ratio, Mitsubishi claims power figures of 70 kW at 6000 rpm and torque of 125 Nm at 4000 rpm. THe engine has seen service in non-Australian RG Mitsubishi Colts.
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===Specifications===
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{|cellpadding="3" align="left"
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|'''Displacement'''
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|1332cc (1.3 litres)
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|-
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|'''Bore'''
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|75.0mm
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|-
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|'''Stroke'''
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|75.4mm
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|-
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|'''Compression Ratio'''
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|10.5:1
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|-
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|'''Output'''
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|73 kW @ 6000 rpm, 125 Nm @ 4000 rpm
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|-
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|}
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{{Clear}}
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===Used in===
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*Smart ForFour (2004-2006)
  
 
==4A91==
 
==4A91==
The 4G91 is a 1.5 litre engine displacing 1499cc. It has a 75.0 mm x 84.8 mm bore and stroke with a 10.0:1 compression ratio, power is claimed to be 80 kW at 6000 rpm and torque 145 Nm at 4000 rpm. It has been used in the RG Mitsubishi Colt both in Australia and overseas.
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===Specifications===
 +
{|cellpadding="3" align="left"
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|'''Displacement'''
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|1499cc (1.5 litres)
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|-
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|'''Bore'''
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|75.0mm
 +
|-
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|'''Stroke'''
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|84.8mm
 +
|-
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|'''Compression Ratio'''
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|10.0:1
 +
|-
 +
|'''Output'''
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|80 kW @ 6000 rpm, 145 Nm @ 4000 rpm
 +
|-
 +
|}
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{{Clear}}
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===Used In===
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*Mitsubishi [[Colt (RG)]]
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*Smart ForFour (2004-2006)
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==4A92==
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===Specifications===
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{|cellpadding="3" align="left"
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|'''Displacement'''
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|1590cc (1.6 litres)
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|-
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|'''Bore'''
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|75.0mm
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|-
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|'''Stroke'''
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|90.0mm
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|-
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|'''Compression Ratio'''
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|11.0:1
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|-
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|'''Output'''
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|86 kW @ 6000 rpm, 154 Nm @ 4000 rpm
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|-
 +
|}
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{{Clear}}
  
 
==Web Links==
 
==Web Links==

Latest revision as of 01:30, 14 September 2020

4A9x
4A91.jpg
4A91 in a Colt (RG)
Overview
Manufacturer MDC Power
Shenyang Aerospace Mitsubishi Motors Engine Manufacturing
Production 2003 - present
Layout
Configuration Inline 4
Cylinder block alloy Aluminum die-cast
Cylinder head alloy Aluminum die-cast
Valvetrain Direct acting DOHC, 16 valves, continuously variable MIVEC intake valve timing
Chronology
Predecessor Orion (4G1x)

The 4A9x family was designed by Mitsubishi to replace the Orion engine in its small vehicles. Mitsubishi designed it to be lightweight, compact and powerful. All 4A9x engines feature an all-aluminium design with chain driven double overhead camshafts, four valves per cylinder (16 in total) and continuously variable MIVEC on the intake camshaft. It is the first Mitsubishi engine to use a high pressure die-cast aluminium block.

The engine has been built at the joint Mitsubishi Daimler-Chrysler facility - MDC Power in Germany since 2003 and the Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co Ltd in China since 2009.

4A90

Specifications

Displacement 1332cc (1.3 litres)
Bore 75.0mm
Stroke 75.4mm
Compression Ratio 10.5:1
Output 73 kW @ 6000 rpm, 125 Nm @ 4000 rpm

Used in

  • Smart ForFour (2004-2006)

4A91

Specifications

Displacement 1499cc (1.5 litres)
Bore 75.0mm
Stroke 84.8mm
Compression Ratio 10.0:1
Output 80 kW @ 6000 rpm, 145 Nm @ 4000 rpm

Used In

  • Mitsubishi Colt (RG)
  • Smart ForFour (2004-2006)

4A92

Specifications

Displacement 1590cc (1.6 litres)
Bore 75.0mm
Stroke 90.0mm
Compression Ratio 11.0:1
Output 86 kW @ 6000 rpm, 154 Nm @ 4000 rpm

Web Links

MITSUBISHI PETROL ENGINES
3 cylinder
3A9x 3A90 3A91 3A92
4 cylinder
Neptune 4G41 4G42
Orion 4G11 4G12 4G13 4G15 4G17 4G18 4G19 G4ED
Sirius 4G61 4G62 4G63 4G64 4G67 4G69
Astron 4G51 4G52 4G53 4G54
Astron II Original Revised
Saturn 4G30 4G31 4G32 4G33 4G37
4G9x 4G91 4G92 4G93 4G94
4A9x 4A90 4A91 4A92
4B1x 4B10 4B11 4B11T 4B12
Inline 6
Saturn 6 6G34
V6
6G7x 6G71 6G72 SOHC 12v 6G72 SOHC 24v 6G72 DOHC Early 6G74 Late 6G74 Ralliart 6G74 6G75
6A1x 6A10 6A11 6A12 6A13
6B3x 6B31
V8
8A80 8A80