The larger 1.8 L 4G62 was an SOHC 8-valve unit for longitudinal rear-wheel drive and all-wheel drive use. 1988–1992 Mitsubishi Mirage / Mitsubishi Colt (MPFI).Unlike the other Sirius motors, the 4G61 does not have balance shafts. A turbocharged version was also produced for the Mirage and Lancer.

This engine was always DOHC 16-valve and used either Multi-point (MPFI) or Electronic Control (ECFI) fuel injection. The 4D6 diesel engines supplemented the larger 4D5. A UK-market Evo known as the FQ400 had a 400 bhp (298 kW 406 PS) version of the Sirius, making it the most powerful car ever sold by Mitsubishi. The 4G61T powered their Colt Turbo, while the 4G63T, first introduced in the 1980 Lancer EX 2000 Turbo, went on to see service in the Sapporo and Starion coupés during the so-called 'turbo era' of the 1980s, before creating for itself an illustrious motorsport heritage as the powerplant under the hood of the World Rally Championship-winning Lancer Evolution. The 4G6 gasoline engines were the favoured performance variant for Mitsubishi. The Mitsubishi Sirius or 4G6/4D6 engine is the name of one of Mitsubishi Motors' four series of inline-four automobile engines, along with Astron, Orion, and Saturn.

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