1988 BMW 325iS Engine

Overview

Models

Engine	Displacement	Power	Torque	Redline	Year
M20B20	2.0 L (1990 cc/121 in³)	92 kW (123 hp) @ 5800	165 N·m (121 ft·lbf) @ 4000		1981
		92 kW (123 hp) @ 5800	170 N·m (125 ft·lbf) @ 4000		1981
		95 kW (129 hp) @ 6000	174 N·m (128 ft·lbf) @ 4000	6200	1985
		95 kW (129 hp) @ 6000	164 N·m (120 ft·lbf) @ 4300	6200	1986
M20B23	2.3 L (2316 cc/141 in³)	102 kW (143 hp) @ 5300	205 N·m (151 ft·lbf) @ 4000	6500	1982
		110 kW (150 hp) @ 6000	205 N·m (151 ft·lbf) @ 4000	6500	1983
M20B25	2.5 L (2494 cc/152 in³)	126 kW (169 hp) @ 5800	226 N·m (166 ft·lbf) @ 4000	6700	1985
		120 kW (161 hp) @ 5800	215 N·m (158 ft·lbf) @ 4000	6700	1985
		125 kW (169 hp) @ 5800	222 N·m (163 ft·lbf) @ 4300	6700	1987
M20B27	2.7 L (2693 cc/164 in³)	92 kW (121 hp) @ 4250	240 N·m (177 ft·lbf) @ 3250	4800	1983
		95 kW (127 hp) @ 4250	240 N·m (177 ft·lbf) @ 3250	4800	1986
		90 kW (120 hp) @ 4250	230 N·m (169 ft·lbf) @ 3250	4800	1985
		95 kW (127 hp) @ 4800	230 N·m (169 ft·lbf) @ 3200	5200	1987

 

 

M20B25

The German version of the M20B25 produced 170 hp (130 kW) with a catalytic converter and 171 hp (128 kW) without. It featured the newly designed "885" head featuring an open, higher-volume combustion chamber design. The new engine had an 84 mm (3.3 in) bore, and 75 mm (3 in) stroke. The redesigned pistons and combustion chambers made better power, resisted detonation better and had higher thermodynamic efficiency. It was equipped with Bosch Motronic 1.1/1.3 Adaptive fuel injection. The new 12 valve engineering gave M20B25 the name 'verschieden', meaning 'different' in German. The engine is often referred to as 'the differing one' due to the anomalous valve system. With a minor modification that adjusts the idle speed of a cold engine, the 325i fulfills Euro 2 emission requirements in Germany, resulting in a lower tax compared to Euro 1 (as of 2005).
Applications:

• 1986–1994 E30 3 Series
• 1989–1990 E34 5 Series
• 1988–1991 E30 Z1

Source: http://en.wikipedia.org/wiki/BMW_M20#M20B25