[2] This engine was designed around the new LASRE technology for lighter weight – such as sintered hollow camshafts.

Since just one displacement was offered, all G-family engines are marked 1G and share the same "square" 75 mm (2.95 in) bore and stroke.

Applications: The export-spec two-valve 1G-E had no emissions controls and were used in commercial vehicles and for a few export markets, mostly southeast Asia.

It was introduced in 1988, it features a cast iron block with aluminum cylinder head and uses the slave cam system.

Production of this engine family ceased in 2008 after the discontinuation of the Crown Sedan mild hybrid.

[6] Applications: The 24-valve DOHC 1G-GEU was intended for high performance and featured a pent-roof combustion chamber.

To minimize the downsides of a multi-valve setup, the 1G-GEU was also equipped with T-VIS (Toyota Variable Induction System), increasing low to mid-engine speed torque.

Like all following twin cam Toyotas, it used a timing belt rather than chain, for less noise and lower maintenance requirements.

In August 1983, the fuel injection system was changed to EFI-D, which measures the pressure in the intake manifold to determine the proper air-fuel mixture.