In 1968-69 there were 2 different 455 engines. The base 455 put out 375 h.p and the higher compression ratio engine put out 400 h.p.
A 1974 Oldsmobile 455 V8 has horsepower of 275 to 400. The Oldsmobile 455 was last produced in the year of 1975.
320 hp
There were 4 engines available in the Oldsmobile 455 4V, a 225, 250, 270 and 300 HP.
It ranged anywhere from 310-365 hp.
250 ci 105 HP, 305 ci 140 HP, 350 ci 145 HP, 350 ci 165 HP, 400 ci 175 HP.
The horsepower (HP) of a 455 cubic inch Oldsmobile engine, commonly referred to as the Olds 455, varies depending on the specific model and year. Generally, the 455 engine produced between 300 and 365 horsepower in its various configurations during the 1970s. The high-performance versions, particularly those found in the Oldsmobile 442, often approached the upper end of this range. Always refer to the engine specifications for the exact model in question for precise numbers.
Oldsmobile 455ci V8's have between 310-390 HP depending on the exact year and maybe other factors - I have one in my '72 jet boat, when in this application some HP is taken away when total HP is caculated because of the way it is used. Adultoys2007@gmail.com
With the 232 ci engine, 100 HP.With the 258 ci engine, 110 HP. With the 304 ci V8 engine, 150 HP. With the 360 ci V8 engine, 175 HP. With the 360-4 V8 engine, 220 HP. With the 401-4 V8 engine, 255 HP.
Ca 160 kW=215 hp
if it has the 350 CI engine it has 250 HP @ 4400 RPM if its the 305 CI engine it has 235 HP @ 4200 RPM
at least 365
Around 365 gross hp