The 1.9 L (1,897 cc) CIH was the largest of the original three introduced.
Bore is 93 mm (3.66 in) while the stroke remains 69.8 mm (2.75 in).
The 1900 was available in carburetted or fuel injected forms, for either normal or super petrol with a variety of power outputs.
An N version was a later addition.
Output is 90 PS (66 kW) for the original 19S. There was also the 19HL (Hochleistung, or "high power"), introduced in 1967 for the sporty Opel Rekord Sprint and Kadett Rallye Sprint models.
This version has 106 PS (78 kW), compared to 97 PS (71 kW) for the slightly more powerful 19SH only fitted to the Rekord(H meaning Hydraulc valve lifters).
The 19SH lost some power in 1975, down to 90 PS (66 kW) and the new 19N was introduced to replace the discontinued 17S; like the 17S it offered 75 PS (55 kW) but used cheaper gasoline and more relaxed driving characteristics.
The 1900 is the most common version in the CIH family, available in the most versions and with the longest production time.

The 19E was the first of the CIH four-cylinders to receive fuel injection.
It first appeared in the Manta GT/E in March 1974, with 105 PS (77 kW).
There is also a low-powered version of the 19N (the A19N) with 69 PS (51 kW) which was mostly fitted to the Opel Rekord E, and a special low emission version for the Swedish and Swiss markets called the S19S which develops 88 PS (65 kW).

Applications
August 1965 - July 1966 Opel Rekord B
August 1966 - December 1971 Opel Rekord C
September 1967 - July 1973 Opel Kadett B Rallye (19 S/HL)
August 1967 - July 1970 Opel Olympia A coupé (19S)
October 1968 - middle 1973 Opel GT
September 1970 - August 1975 Opel Manta A
October 1970 - September 1975 Opel Ascona A
January 1972 - August 1977 Opel Rekord D
August 1975 - May 1981 Opel Manta B
September 1975 - August 1981 Opel Ascona B
September 1975 - July 1979 Opel Kadett C GT/E (19E only)
August 1977 - August 1982 Opel Rekord E
February 1970 - December 1971 Ranger A
January 1972 - August 1977 Ranger B
May 1974 - February 1976 Holden Torana LH
February 1976 - November 1976 Holden Torana LX
November 1976 - March 1978 Holden Sunbird LX
March 1978 - 1978 Holden Sunbird LX
1978 - 1985 Saehan/Daewoo Rekord/Royale
November 1975 - July 1981 Vauxhall Cavalier Mark I
The 1.9 L (1,897 cc) CIH was the largest of the original three introduced. Bore is 93 mm (3.66 in) while the stroke remains 69.8 mm (2.75 in). The 1900 was available in carburetted or fuel injected forms, for either normal or super petrol with a variety of power outputs. An N version was a later addition. Output is 90 PS (66 kW) for the original 19S. There was also the 19HL (Hochleistung, or "high power"), introduced in 1967 for the sporty Opel Rekord Sprint and Kadett Rallye Sprint models. This version has 106 PS (78 kW), compared to 97 PS (71 kW) for the slightly more powerful 19SH only fitted to the Rekord(H meaning Hydraulc valve lifters). The 19SH lost some power in 1975, down to 90 PS (66 kW) and the new 19N was introduced to replace the discontinued 17S; like the 17S it offered 75 PS (55 kW) but used cheaper gasoline and more relaxed driving characteristics. The 1900 is the most common version in the CIH family, available in the most versions and with the longest production time.
The 19E was the first of the CIH four-cylinders to receive fuel injection. It first appeared in the Manta GT/E in March 1974, with 105 PS (77 kW). There is also a low-powered version of the 19N (the A19N) with 69 PS (51 kW) which was mostly fitted to the Opel Rekord E, and a special low emission version for the Swedish and Swiss markets called the S19S which develops 88 PS (65 kW).
Applications
August 1965 - July 1966 Opel Rekord B
August 1966 - December 1971 Opel Rekord C
September 1967 - July 1973 Opel Kadett B Rallye (19 S/HL)
August 1967 - July 1970 Opel Olympia A coupé (19S)
October 1968 - middle 1973 Opel GT
September 1970 - August 1975 Opel Manta A
October 1970 - September 1975 Opel Ascona A
January 1972 - August 1977 Opel Rekord D
August 1975 - May 1981 Opel Manta B
September 1975 - August 1981 Opel Ascona B
September 1975 - July 1979 Opel Kadett C GT/E (19E only)
August 1977 - August 1982 Opel Rekord E
February 1970 - December 1971 Ranger A
January 1972 - August 1977 Ranger B
May 1974 - February 1976 Holden Torana LH
February 1976 - November 1976 Holden Torana LX
November 1976 - March 1978 Holden Sunbird LX
March 1978 - 1978 Holden Sunbird LX
1978 - 1985 Saehan/Daewoo Rekord/Royale
November 1975 - July 1981 Vauxhall Cavalier Mark I
Opel cam-in-head engine