I would say Martin Hadlands ESCOS in white when it ran everything for 550bhp and 180+MPH but he swapped engine briefly for a stage3 330bhp engine that did the 3rd quickest 0-100MPH at the time... best of both world IMO. its not the engine that sorts the time and performance, ask martin and Danny B- 12sec car on a stg1

Though at Martins level now extra power is always welcome seeing as he has the chassis to take it