The Oldsmobile 442 means (400 cubic inches-after '65) (four barrel carb) and (dual exhaust) if your car does not have these it is not a true 442. The 350 that year had only 160hp to 180hp but the 442 should have had the 455 and 270hp to 300hp. Are you sure your car is a 442? It may be a cutlass with a 442 paint job.
140 horsepower
There were 4 engines available in the Oldsmobile 455 4V, a 225, 250, 270 and 300 HP.
Advertised Horsepower is : 240 HP @ 4000 RPMS The only information I can find is a 1973 454 truck engine. Nothing in 1972
they stock 307 engine code "9" had 170 hp for 1987
Depends on the year
the horsepower of a car depends on the number of cylinders it has. The engine displacement does not affect the horsepower of a car by much.
175hp, 310lb/ft of torque.
In 2002 it could either have a 2.2 L with 140 horsepower or 3.4 L with 170 horsepower.
205 hp factory
It depends. It could have 12 horsepower or 1592 horsepower.
Oldsmobile stopped production of the 455 in 1976. There were no 455s produced in 1987.
My Chilton repair manual shows , for the 1978 Oldsmobile 260 cubic inch V8 engine : 110 horsepower at 3400 RPM - 205 ft/lbs torque at 1800 RPM