Originally Posted by Red Bread
MkIV Supras had an I6 with twin turbos.
You are right! That was already in the 90s, more than 10 years before the N54/N55 BMW. Thanks, and my apologies to Toyota.
OK, so perhaps BMW was the first to mass-produce all-aluminium twin-turbo I6 engines then. I believe BMWs N54 is 70kg/154lbs lighter than the older Supra 2JZ-GTE engine.