Dreamcar

[GMX]

there is only one highly modified 6cyl behind the driver . i mean a evo with a few mods can get 400+hp and thats a 4cyl. so 900 for a 6 isn't to far out.
formula 1 cars only had 1.5L engines and had massive HP, its all about what you can do to an engine

And that massive hp lasted for a couple of laps.

Back then the difference between a qualifying engine and race engine power output was significant.