For that year/model, it got 180HP for a 5-speed, and 160HP for an automatic.
In 1990, both the base Cutlass and the sporty International Series came with the new 180-horsepower, 2.3-liter High Output version of the Quad 4 engine mated to a 5-speed manual transmission. For those preferring an automatic, the standard 3-speed gearbox required dropping to the meeker 160-horsepower Quad 4.
The High Output version delivered 160 pound-feet of torque at 5200 rpm while the basic Quad 4 did nearly as well, with 155 pound-feet of torque at 5200 rpm. In 1990, the V6 provided to be the weakest engine offered, producing only 135 horsepower at 4400 rpm and 180 pound-feet of torque at 3600.
About the Quad4, also see:
From 1989 to 2009, the Quad 4 held the title of being General Motors' most powerful naturally aspirated regular production four-cylinder engine (with the exception of the 2.92L I4 Atlas engines used in 2007-2012 Chevrolet Colorados and GMC Canyons). Only recently was the LG0's 180 bhp (134 kW) rating eclipsed when the 2010 model year 2.4 L (2,392.3 cc) Ecotec LAF was launched in the Buick Lacrosse and Chevrolet Equinox. The LAF has a rated output of 182 hp (136 kW) but does so with an 11.4:1 compression ratio, gasoline direct injection and variable valve timing.