Mitsubishi 4A9 engine

The Mitsubishi 4A9 engine is a line of in-line 4-cylinder gasoline engines with 1.3L, 1.5L and 1.6L from Mitsubishi Motors. First installed in the Mitsubishi Colt in 2004.

History

The 4A9 project began as a joint effort between Mitsubishi Motors and Daimler Chrysler (now Daimler), with Mitsubishi Motors responsible for engine development. Manufactured at MDC Power GmbH in Germany, a Daimler subsidiary (formerly a joint venture with Mitsubishi Motors), it is now at Mitsubishi Motors Powertrain Factory in Kyoto. The model in Mercedes-Benz of 4A9 type is M135, 4A90 is M135 E13, 4A91 is M135 E15.

The 4A9 is the first Mitsubishi Motors in-line 4-engine series to adopt a high-pressure die-cast aluminium alloy cylinder block. In addition, it uses an aluminium alloy cylinder head, DOHC 4 valve structure and (intake side only) MIVEC variable valve mechanism the cylinder-head cover and intake manifold are made of plastic. In addition, the camshaft is driven by a timing chain instead of the conventional 4G1 type timing belt.

Variations 

4A90 (1.3L)

• Type: DOHC 16 valve MIVEC
• Displacement: 1,332cc
• Bore pitch: 83.0mm
• Bore: 75.0mm
• Stroke: 75.4mm
• Maximum output: 70kW (95PS) / 6,000rpm
• Maximum torque: 125N m (92 kg m) / 4,000 rpm

Installed vehicle

• 2004-2012 Mitsubishi Colt, Colt Plus
• 2004-2006 Smart Forfour
• DFM Joyear X3
• Zotye Z200
• BAIC Up
• Haima 2

4A91 (1.5L)

• Type: DOHC 16 valve MIVEC
• Displacement: 1,499cc 1.5 L 
• Bore pitch: 83.0mm
• Bore: 75.0mm
• Stroke: 84.8mm
• Compression ratio: 10.0:1
• Maximum output: 80kW (109PS) 109 hp / 6,000rpm
• Maximum Torque: 145N m (107 ft lb) / 4,000 rpm

Installed vehicle

• 2004-2012 Mitsubishi Colt, Colt Plus
• 2007-2015 Mitsubishi Lancer
• 2004-2006 Smart Forfour
• BAIC BJ20
• Brilliance FSV
• Brilliance V5
• Haima 2
• Soueast Motor V5
• Soueast Motor V-cross (turbo spec)
• Soueast Motor V3 (series Lancer)
• Soueast DX3
• Soueast DX7
• Senova D20
• Senova D50
• Senova X55
• Mitsubishi Xpander
• Nissan Livina
• Yema T70 SUV
• Zotye Z300
• Zotye SR7

The Smart Forfour 1.5 Sports Style (limited to 500 units, not yet introduced in Japan) was equipped with an engine tuned by Brabus. At the same time, an SB3 kit that tunes the existing 1.5 engine to similar specifications was also sold. The main contents are changes in the camshaft and ECU, and the output is as follows.

• Maximum output: 90kW (122PS) / 6,250rpm
• Maximum Torque: 160N m / 3,800rpm

4A92 (1.6L)

• Type: DOHC 16 valve MIVEC
• Displacement: 1,590cc 1.6L
• Bore: 75.0mm
• Stroke: 90.0mm
• Compression ratio: 11.0:1
• Maximum output: 86kW (117PS) 115 hp / 6,000rpm
• Maximum Torque: 154N m (114 ft lbf) / 4,000 rpm

Installed vehicle

• 2010- Mitsubishi ASX
• 2011 -Mitsubishi Lancer (European spec)
• Brilliance H530
• Brilliance V5
• DFM Joyear X3