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Toyota R EngineThe Toyota R family was a series of straight-4 engines produced from 1953 through 1990. It was designed for longitudinal use in such vehicles as the Celica and Cressida. OHC versions featured a chain-driven camshaft. R The 1.5 L (1453 cc) R family was produced from 1953 through 1964. Bore was 77 mm (3.03 in) and stroke was 78 mm (3.07 in). A LPG version, the R-LPG, was produced for the last two years. The R engine was the first Toyota engine to be used in a United States-market vehicle, the 1958 Toyopet Crown. Output for that engine was 60 hp (45 kW) at 4400 RPM with 79.5 ft.lbf (108 Nm) of torque at 2600 RPM. Road & Track was unimpressed with the engine on its introduction, noting that it idled quietly but was "not capable of very high revolutions per minute." 2R The 1.5 L (1490 cc) 2R family was produced from 1964 through 1969. Again, an LPG version, the 2R-LPG, was produced alongside the gasoline version all five years. 3R The 1.9 L (1897 cc) 3R family was produced from 1959 through 1968. A 3R-B version was offered from 1960 through 1968, and an LPG 3R-LPG variant was made for the last five years. Applications: 4R The 1.6 L (1587 cc) 4R family was produced from 1965 through 1968. Bore was 78 mm. Applications: 5R The 2.0 L (1994 cc) 5R family was produced from 1968 through 1986. It was a 2-valve OHV engine. Cylinder bore was 88 mm (3.46 in) and stroke was 82 mm (3.23 in). Output was 106 hp (79 kW) at 5200 RPM and 125 ft.lbf (169 Nm) at 3000 RPM. An LPG version, the 5R-LPG, was produced from 1968 through 1983. 6R The 1.7 L (1707 cc) 6R was produced from 1969 through 1974. The 6R-B was produced those same years, and the LPG 6R-LPG was produced from 1970 through 1973. 7R The 1.6 L (1591 cc) 7R was produced from 1968 through 1971. The 7R-B was produced from 1968 through 1969, and the LPG 7R-LPG was produced from 1969 through 1970. 8R The 1.9 L (1858 cc) 8R was a major departure for the R family. With a 2-valve SOHC head, it impressed contemporary reviewers - Road & Track praised quietness and free-revving nature. The engine was produced from 1968 through 1972 and was also available as the 8R-B, 8R-E, and California-spec 8R-C. Output was 108 hp (81 kW) at 5500 RPM and 113 ft.lbf (153 Nm) at 3800 RPM. Cylinder bore was 85.9 mm (3.38 in) and stroke was 80 mm (3.15 in). Applications: 8R-G The Toyota again upped the ante with the DOHC (but still 2-valve) 8R-G in 1969. Output was 140 hp (104 kW) at 6400 RPM and 123 ft.lbf (166 Nm) at 5200 RPM. This engine was also produced through 1972. 9R The 1.6 L (1587 cc) 9R was produced from 1967 through 1968. Output was 110 hp (82 kW) at 6200 RPM and 101 ft.lbf (136 Nm) at 5000 RPM. It was a 2-valve DOHC design. 12R The 1.6 L (1587 cc) 12R was produced from 1969 through 1988. An LPG version, the 12R-LPG, was produced from 1969 through 1983. 16R The 1.8 L (1808 cc) 16R was produced from 1974 through 1980 with the 16R-B was produced for the first two years. 18R The 18R series shared a 2.0 L (1968 cc) block; cylinder bore was 88.5 mm (3.48 in) and stroke was 80 mm (3.15 in). The 2-valve SOHC 18R produced 86-89 hp (64-66 kW) and 105-107 ft.lbf (142-145 Nm). It was also available in California spec (18R-C) from 1971 through 1974. Output was 97 hp (72 kW) at 5500 RPM and 106 ft.lbf (143 Nm) at 3600 RPM. The Japan-spec 1975-1981 18R-U produced 100 hp (75 kW) at 5500 RPM. Applications: 18R-G The 2-valve DOHC 18R-G was produced from 1972 through 1974. Output was 110-145 hp (82-108 kW) at 6400 RPM and 131 ft.lbf (177 Nm) at 5200 RPM. It was also available in Japan-spec (The 1975 18R-GU) with 130 hp (97 kW) at 6000 RPM. Air injection was added in 1975's 18R-GR for improved emissions. Output was 140 hp (104 kW) at 6400 RPM. A fuel injected Japan-market version, the 18R-GEU, was produced from 1978 through 1982. This pushed output up to 135 hp (101 kW) at 5800 RPM and 127 ft.lbf (172 Nm) at 4400 RPM. 20R The 2-valve SOHC 2.2 L (2189 cc) 20R was produced from 1975 through 1980. Cylinder bore was 88.4 mm (3.48 in) and stroke was 88.9 mm (3.5 in). Initial output was 96 hp (72 kW) at 4800 RPM and 120 ft.lbf (162 Nm) at 2800 RPM. Power was down slightly from 1978 through 1979 at 95 hp (71 kW) at 4800 RPM and 122 ft.lbf (165 Nm) at 2400 RPM. The final version, from 1979 through 1980, was down again at 90 hp (67 kW) at 4800 RPM and 122 ft.lbf (165 Nm) at 2400 RPM. Applications: 21R The 2.0 L (1972 cc) 21R was produced from 1978 through 1987. Cylinder bore was 84 mm (3.31 in) and stroke was 89 mm (3.5 in). It was a 2-valve SOHC engine. Output in 1978, constrained by emissions, was 105 hp (78 kW) at 5200 RPM and 116 ft.lbf (157 Nm) at 3600 RPM. Air injection and California emissions equipment for the 21R-C (1982-1985) dropped power down to 90 hp (67 kW) at 5000 RPM. The air-injected Japanese version, the 21R-U, produced 105 hp (78 kW) at 5200 RPM and 120 ft.lbf (162 Nm) at 3600 RPM but dropped to 101 hp (75 kW) at 5400 RPM and 114 ft.lbf (154 Nm) at 4000 RPM in 1986. 22R The 2-valve SOHC 2.4 L (2366 cc) 22R was produced from 1981 through 1990. Cylinder bore was 91.9 mm (3.62 in) and stroke was 88.9 mm (3.5 in). Initial output was 96 hp (72 kW) at 4800 RPM and 129 ft.lbf (174 Nm) at 2800 RPM. By 1990 the 22R was producing 108 hp (81 kW) at 5000 RPM and 138 ft.lbf (187 Nm) at 3400 RPM. Fuel injection in the 22R-E brought output to 105 hp (78 kW) at 4800 RPM and 137 ft.lbf (185 Nm) at 2800 RPM. In 1990, the engine was reworked with a shorter block design, output was up to 112 hp (84 kW) at 4600 RPM and 142 ft.lbf (192 Nm) at 3400 RPM. The turbocharged 22R-TE (sold from 1984 through 1988) produced 135 hp (101 kW) at 4800 RPM and 173 ft.lbf (234 Nm) at 2800 RPM. Applications: See also R
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