The Toyota S Series engines are a family of straight-4 petrol or CNG engines with displacement from 1.8 L to 2.2 L produced by Toyota Motor Corporation from January 1980 to August 2007. The series has cast iron engine blocks and aluminium cylinder heads. Table of S-block engines 1S The 1S is the first version of the S-series engine. It is a member of Toyota's Lasre engine family (Lightweight Advanced Super Response Engine). Bore and stroke are 80.5 x 90.0 mm. The engine was first seen in 1981, and was fitted to a wide range of Toyotas, in both RWD and FWD applications. 1S (1S-U) Original 1S engine, designed for longitudinal, rear-wheel-drive applications. Designated 1S-U with Japanese emissions controls. Production: July 1981 — unknown Displacement: 1832 cc Mounting: longitudinal Type: SOHC 8-valve Bore/stroke: 80.5 × 89.9 mm Compression ratio: 9.1 Outputs: at 5,400 rpm / at 3,400 rpm Applications: Toyota Celica (SA60) Toyota Carina (SA60) Toyota Corona (ST140) Toyota Mark II (SX70) 1S-L (1S-LU) Adaption of the 1S engine, designed for transverse, front-wheel-drive applications. Designated 1S-LU with Japanese emissions controls. Production: March 1982 — unknown Displacement: 1832 cc Mounting: transverse Type: SOHC 8-valve Bore/stroke: 80.5 × 89.9 mm Compression ratio: 9.1 Outputs: at 5,400 rpm / at 3,400 rpm Applications: Toyota Camry/Vista (SV10) Toyota Corona (ST150) 1S-iL (1S-iLU; 1S-i) Adaption of the 1S-L engine, with added central injection (Ci). Designated 1S-iLU with Japanese emissions controls. Later versions renamed 1S-i. Sometimes labelled 1S-Ci in marketing material. Production: June 1984 — unknown Displacement: 1832 cc Mounting: transverse Type: SOHC 8-valve, central injection Bore/stroke: 80.5 × 89.9 mm Compression ratio: 9.1 Outputs: at 5,200 rpm / at 3,000 rpm at 5,400 rpm / at 3,000 rpm at 5,400 rpm / at 3,000 rpm Applications: Toyota Camry/Vista (SV10) Toyota Camry/Vista (SV20) Toyota Corona (ST150) 1S-EL (1S-ELU; 1S-E) Adaption of the 1S-L engine, with added multiport fuel injection. Designated 1S-ELU with Japanese emissions controls. Later versions renamed 1S-E. Production: unknown Displacement: 1832 cc Mounting: transverse Type: SOHC 8-valve, multiport fuel injection Bore/stroke: 80.5 × 89.9 mm Compression ratio: 9.1 Outputs: at 5,400 rpm / at 4000 rpm Applications: Toyota Corona (ST150) 2S The 2S is a four-cylinder engine with an iron block and an alloy head. Bore and stroke are 84.0 x 90.0 mm. This was to be the last of the S engine family not to be equipped with twincams. The 2S (with no