The fifth generation of the Quattroporte was unveiled to the world at the Frankfurt Motor Show on 9 September 2003 and made its U.S. première at the 2003 Pebble Beach Concours d’Élégance; production started in 2004. Exterior and interior design was done by Pininfarina. Built on an entirely new platform, it was 19.7 in longer than its predecessor and sat on a longer 15.7 in wheelbase. Initially it was powered by an evolution of the naturally aspirated dry sump 4.2-litre V8 engine, mounted on the Maserati Coupé, with an improved output of 400 PS (294 kW). Due to its greater weight compared to the Coupé and Spyder, the 0-62 mph time for the Quattroporte was 5.2 seconds and the top speed 171 mph.