Please show me that rule.
Also, how long do those 4 cyls last when they are making 3000 hp? Oh yeah, THEY CAN'T!
How many 4 cyls make the entire length of the Daytona 500? NONE - they can't even make it to the starting line!
There are more V8s made in the 1960s still running than 4 cyls made in the 1970s. That's a whole decade up on them!