Vehicle Summary On sale since April 2001 as a 2002 model, Infiniti’s flagship performance luxury sedan is entering its third generation with lot more power than before — 340 horsepower to be precise, courtesy of bigger and efficient V-8 engine. First seen at the 2000 New York Auto Show officially introduced Detroit’s North American International in January 2001, top from Nissan’s division hasn’t changed much size but has load new technical features, either standard or optional.