In generally the biggest advancement on ICE engines on last 20 yrs are materials (lower internal friction), better control of mixture forming and burnign (better control electronics, direct injection, etc)
Not all of these advancement are nessarily for good in terms of durability IMO.
But for you question, take std.M54B30 and slap couple of turbos to it and it gives easy 500hp. Rebuild it to suite and you have more with reliabilty, so you dont need modern engine to make power, those turboes does most of the work.
In generally the biggest advancement on ICE engines on last 20 yrs are materials (lower internal friction), better control of mixture forming and burnign (better control electronics, direct injection, etc)
Not all of these advancement are nessarily for good in terms of durability IMO.
But for you question, take std.M54B30 and slap couple of turbos to it and it gives easy 500hp. Rebuild it to suite and you have more with reliabilty, so you dont need modern engine to make power, those turboes does most of the work.