Overview
The Mitsubishi 4G9 engine is a series of straight-4 automobile engines produced by Mitsubishi Motors. All are 16-valve, and use both single- and double- overhead camshaft heads. Some feature MIVEC variable valve timing, and it was the first modern gasoline direct injection engine upon its introduction in August 1996.
The 4G91 uses a bore and stroke of 78. 4 mm × 77. 5 mm for a total displacement of 1. 5 L. With a 9. 5:1 compression ratio and DOHC, four-valve-per-cylinder head and multi-point EFI, this engine produces 115 PS at 6,000 rpm and 135 N⋅m at 5,000 rpm. The 4G91 was a short-lived model, mainly built between 1991 and 1995 and rarely seen in export markets. There was also a carbureted model, with 97 PS at 6,000 rpm and 126 N⋅m at 3,500 rpm....
engine brand: mitsubishi
production years: 1999-2007
engine lifespan: ~300 000
features: no
power: 125 (MPI SOHC)
145 (GDI DOHC)
torque: 176 (MPI SOHC)
191 (GDI DOHC)
fuel system: injector (MPI SOHC)
direct injection (GDI DOHC)
fuel type: petrol
euro standards: EURO 3 (MPI SOHC)
EURO 4 (GDI DOHC)
timing drive: belt
hydraulic lifters: yes
phase regulator: no
recommended engine oil: 5W-30
engine oil capacity: 3.8
displacement: 1999
compression ratio: 9.5 (MPI SOHC)
11.0 (GDI DOHC)
turbocharging: no
weight: 150
cylinder bore: 81.5
piston stroke: 95.8
cylinder block: cast iron R4
block head: aluminum 16v