previously been called the M06 and M68, prior to BMW retroactively renaming it the M30B25V (V for Vergaser- carburettor in German). Applications: 1968–1977 E3 2500 1974–1975 E9 2.5 CS 1973–1976 E12 525 — , Solex 4A1 carburettor 1976–1981 E12 525 1977–1979 E23 725 M30B25 In 1981, Bosch L-Jetronic electronic fuel injection was added to the version. Peak power remained unchanged at , however torque increased slightly to . Applications: 1981-1987 E28 525i 1981-1986 E23 725i M30B28V In its original form, the carburetted 2.8 used two Solex Zenith "35/40 INAT" carburetors, the compression ratio is 9.0:1 and the engine produces and . The specifications went on to vary depending on the model year, carburettor and country. The bore is and the stroke is . This version has also been known as the M06 and M68, prior to BMW renaming it the M30B28V. Applications: 1968-1977 E3 2800 / 2.8L — 1968-1971 E9 2800 CS — 1971-1971 E3 Bavaria — , United States only 1974-1976 E12 528 — dual Zenith INAT carburettors 1976-1978 E12 528 — , Solex 4A1 carburettor 1977-1979 E23 728 — , Solex 4A1 carburettor M30B28 In 1977, Bosch L-Jetronic electronic fuel injection was added to the version. Power increased to and torque increased to . 1977-1978 E12 528i — North America only, , 9.0:1 compression ratio 1978-1981 E12 528i — 1979-1986 E23 728i 1979-1987 E24 628CSi 1981-1987 E28 528i M30B30V Based on the M30B28V version with a larger bore, the M30B30V produces and , uses dual Zenith 35/40 INAT carburettors and has a compression ratio of 9.0:1. In United States trim, this engine produced at 5800 rpm. Applications: 1971-1975 E9 3.0 CS 1971-1972 E9 3.0 CSL 1971-1974 E3 3.0 S / 3.0 L / Bavaria 1976-1979 E24 630 CS — , Pierburg 4A1 carburetor 1977-1979 E23 730 — , Solex 4 A 1 carburettor M30B30 The fuel injected version of the M30 debuted in 1971 in the E9 3.0 CSi and initially used the Bosch D-Jetronic mechanical fuel injection system. In 1976, the fuel injection system was upgraded to Bosch L-Jetronic electronic fuel injection. The M30B30 produces up to and , depending on the model year and whether a catalytic converter is fitted. The compression ratio is 9.2:1. With catalytic converter, compression ratio is 9:1. Applications: 1971-1975 E9 3.0 CSi — 1972-1973 E9 3.0 CSL — 1972-1975 E3 3.0 Si — 1975-1978 E12 530i — North America only, 1976-1976