cc versions of the Sigma engine. Bore and stroke are both larger at 93x85.8 mm, respectively. Output is 203 - 225 PS at 5,500 rpm and 29.6 - 31.8 kgm at 4,000 rpm for the older G6AU and 195 - 220 PS at 5,500-6,000 rpm and 30 - 32 kgm at 3,500 rpm for the newer G6CU.

The 3.5 D has a cast iron engine block and aluminum DOHC cylinder heads. It uses Multi-port fuel injection, has 4 valves per cylinder, and features forged steel