The Toyota 4S engine has been in production since 1987 and had three generations: 4S-Fi and two versions of the 4S-FE. This engine was used in several vehicles throughout its production life, but was primarily used in the Toyota Corolla. The 4S engine was replaced by the 2ZZ line of engines in 1999.
The first version of the 4S engines was the 4S-Fi. This engine was an inline four-cylinder (I-4) with 16 valves -- four per cylinder -- in a double-overhead cam (DOHC) configuration. This engine had a bore (cylinder width) of 82.5 millimetres and a stroke (distance piston travels inside the cylinder) of 86 millimetres. The total displacement was 1,838 cubic centimetres, or 1.8 litres and it had a 9.3:1 compression ratio. This 1.8-litre engine produced 105 horsepower at 5,600rpm and 110 foot-pounds of torque at 2,800rpm. This engine was in production from 1987 through 1990.
1990 Through 1995 4S-FE
The second generation of the 4S line of engines was the 4S-FE. This was a double-overhead cam (DOHC) engine with 16 valves. The 1.8 litre featured a bore of 82.5 millimetres and a stroke of 86 millimetres and 9.3:1 compression ratio. The total engine displacement was 1,838 centimetres. The 4S-FE produced an improved 113 horsepower at 5,600rpm and 116 foot-pounds of torque at 4,400rpm. This version of the 4S-FE was in production from 1990 through 1995.
1995 Through 1998 4S-FE
The final generation of the 4S engines was the second version of the 4S-FE. This engine, just as with the first 4S-FE, was a double-overhead cam (DOHC) with 4 valves per cylinder. The 4S-FE also came with a bore of 82.5 millimetres and a stroke of 86 millimetres, creating a total displacement of 1,838 cubic centimetres. The compression ratio was measured at 9.5:1. This version of the 4S-FE also improved power, delivering 125 horsepower at 6,000rpm and 120 foot-pounds of torque at 4,600rpm. The 4S-FE was utilised from 1995 through 1998, as the 1ZZ and 2ZZ engines replaced the 4S engines in 1999.
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