It seems strange for Toyota and BMW to team up on a sports car, but since they both have notable heritage with the I-6, it does make sense. That engine form also leads to car designs with long hoods and short decks. These days, if your turbocharged 3.0L six doesn't make 400 HP, you aren't trying hard enough. GM's 3.0L V6 in the Cadillac CT6 makes 400 HP, as does Ford's in the Lincoln Continental.