[1] In the following decades the Boxer went through several upgrades and powered many Alfa Romeo front-wheel drive cars up to 1996 (not the 164).

This liquid-cooled, four cylinder, boxer (horizontally opposed) engine had a belt-driven water pump.

Its integrated cast iron cylinder block and crankcase had three main bearings.

[14] Applications: In October 1986 the engine was increased in size to 1.7 L (1,712 cc) (104 cu.in), it was used in the 33 and later Sprints, power was between 105 and 118 PS (77 and 87 kW).

[7] Applications: In January 1990 a quad-cam 16-valve version of the venerable boxer was introduced; it was the most powerful to date, with 129–137 PS (95–101 kW) with or without catalytic converters.