The Australian Sigma turbo had a suck-through carb turbo 2.0 4G52 engine and the Scorpion had the same 2.6 4G54 as the US Sapporo/Challenger. The European and Japanese 4th gen (1980-1984) Sapporo/Galant Lambda/Galant Sigma/Eterna Lambda/Eterna Sigma were available with the 2.0 4G63 SOHC EFI turbo along with IRS and…