The 6G74 is a 3,497 cc 24-valve unit available with either SOHC, DOHC, or MIVEC DOHC. Bore is 93 mm and stroke is 85.8 mm. Output for the SOHC version varies from 139 kW (189 PS; 186 hp) at 4,750 rpm with 306 N·m (226 lbf·ft) of torque at 3,750 rpm in the Pajero to 153 kW (208 PS; 205 hp) at 5,000 rpm with 313 N·m (231 lbf·ft) of torque at 4,000 rpm for other applications. For the MIVEC, only available in the Mitsubishi Pajero Evolution, the output is 194 kW (264 PS; 260 hp) at 6,000 and 324 N·m (239 lbf·ft) at 4,500 rpm. The most common 6G74 has a cast iron engine block and an aluminum cylinder head. It uses MFI fuel injection and uses forged steel connecting rods.
The gasoline direct injection version of the 6G74 was launched in April 1997 as the first GDI V6 engine ever produced. It differed from the basic 6G74 in many ways apart from its unique fuel injection system — it had a crown-curved rather than flat combustion chamber, upright intake ports rather than angled, and a 10.4:1 rather than 10.0:1 compression ratio. Mitsubishi claimed 30 percent better fuel economy, a 30 percent reduction in emissions, and higher power outputs than diesels.
Read more about this topic: Mitsubishi 6G7 Engine