K-Jetronic used in a version called the M20B20KE. The compression ratio was raised to 9.9:1. In September 1982 (coinciding with the release of the E30 3 Series), the fuel injection was updated to LE-Jetronic with a redline of 6,200 rpm. Other upgrades included a larger port (known as "731") cylinder head, a lighter block and new manifolds. The "M60" designation was dropped and this version was known as the M20B20LE. In 1987, the M20B20 was again revised with the addition of Bosch Motronic engine management, a catalytic converter and a compression ratio of 8.8:1. The M20B20 was not sold in North America. Applications: 1977–1981 E12 5 Series 520/6 (carburettor) 1977–1982 E21 3 Series 320/6 (carburettor) 1981–1982 E28 5 Series 520i (K-Jetronic) 1982–1984 E28 5 Series 520i (L-Jetronic) 1982–1984 E30 3 Series 320i (L-Jetronic) 1984–1987 E28 5 Series 520i (LE-Jetronic) 1984–1987 E30 3 Series 320i (LE-Jetronic) 1986–1987 E28 5 Series 520i (Motronic) 1987–1992 E30 3 Series 320i (Motronic) 1988–1990 E34 5 Series 520i (Motronic) 1989–1992 Bertone Freeclimber (Freeclimber I) M20B23 In March 1978 (six months after the M20 was launched), a fuel-injected and larger displacement version known as the M20B23KE (or M60/5) was introduced. This version uses the same head (known as "200") and block as the 2.0 litre version but a longer stroke crank. The bore is and it has a capacity of . Fuel injection was K-Jetronic, the compression ratio is 9.5:1, the power output is and the redline is 6,400 rpm. The 1982 version used LE-Jetronic, the 731 cylinder head, a compression ratio of 9.8:1 and the other upgrades as the per the 2.0 litre version. This version is called the M20B23LE and has a power output of . In September 1983, the M20B23LE's fuel-injection, exhaust and camshaft were upgraded and power increased to with a redline of 6,500 rpm. The version continued to be available in certain markets with strict emissions regulations (such as Switzerland) until replaced by the 325i. The M20B23 versions were not sold in North America. Applications: 1977–1982 E21 3 Series 323i (K-Jetronic) 1982–1984 E30 3 Series 323i (L-Jetronic) 1984–1987 E30 3 Series 323i (LE-Jetronic) M20B25 In 1985, the M20B25 replaced the M20B23. The M20B25 has a capacity of and initially produced (without a catalytic converter). It has an upgraded cylinder head (known as "885"), a bore of , a stroke of , a compression ratio of 9.4:1, a redline of 6,500 rpm and