The first AWD Turbo Celica was named the ST165, and was produced between 1986 and 1989. It was Toyota’s first preview of the highly successful 2-litre 3S-GTE engine that develops around 142kW. The engine was all-new and featured an aluminium twin-cam head, which was designed by Yamaha. This engine went on to power all future Celica turbos, the popular series two MR2 and the Caldina up until 2007 – all up, a 21-year period. In the Celica GT-Four, the 3S-GTE was configured to drive all four wheels constantly via a viscous-coupling centre differential. This ST165 has a manually selectable differential lock-switch, allowing the diffs to be switched to fully locked or to a limited-slip operation.