The Maserati Quattroporte

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As of 2018, the Quattroporte S Q4 was upgraded to raise the maximum power to 450 hp (336 kW; 456 PS) from its twin-turbocharged V6 engine. The GTS also received a power upgrade and now generates a maximum power output of 560 hp (418 kW; 568 PS) from its twin-turbocharged V8 engine.[57]

 

The Quattroporte GTS can accelerate from 0–60 mph (97 km/h) in 4.2 seconds and can complete the quarter-mile in 12.7 seconds as evident in Car and Driver's December, 2014 road test.