Stock, 365 Horsepower @ 4600 RPM. However, this motor is the ultimate torque monster, 510 ft/lb @ 3000 RPM. If you have this motor, you are officially made of awesome! With mild mods it's easily a 400 horse motor. This is not true of 455 motors after 1969. 1968-9 motors are the strongest as they haven't been smogged down yet.
The the 1969 OLDS 98 had 365HP
There were 4 engines available in the Oldsmobile 455 4V, a 225, 250, 270 and 300 HP.
89+84+90+94+98=455 455/5= 91 91 is the mean.
I have a 98 V6 and my horsepower is 202. I have a 98 V6 and my hp is 202
The bhp of the 455 olds in 1973 was 225 in delta wagons, delta 88, and olds 98-bhp for toronado was 250 and this engine was optional in cutlass-compression ratio was 8 to 1 with deep dish pistons. It has a 4.13" bore and a 4.25" stroke standard
235 horse is stock on 98 305
98 horsepower
307, 350, 400, 455
244
305
320
In 1979 Pontiac did not make available any 455 (cubic inch) engine. The largest available was a 400 4bbl in the Pontiac Trans Am (220 net horsepower). Also the "rocket engine" description was only applicable to the Oldsmobile Division. The 455 Rocket Engine (Oldsmobile) was discontinued in 1977 where the largest engine was the 403 cubic inch Rocket Engine V8 rated at 185 net horsepower available on the 98 (a 350 cubic inch was standard) and the Toronado. It was also sold to the Buick division and available on the Riviera.