I think the universally agreed best of the V8 engines won only 2 of the 8 V8 WDCs.
so that would
renault and ferrari
not including Mercedes???
The V8s were considered so unbalanced certain manufacturers were given special permission to upgrade.
they could have removed that by letting all teams upgrade or none
There are far bigger factors that define the competitiveness of the F1 field than the engines.
then why were more teams winning races with V8 than V6's???
If you gave everyone in F1 the same engine now, do you think we would see a massive flattening of the competitive hierarchy (apart from Honda)? The best and worst team on the grid currently have the same engine.