the predecessors, the new Quattroporte has frameless doors. Engines and performance The Quattroporte is offered with range of two petrol engines. The Quattroporte GTS features a variant of the F154 engine platform shared with the Ferrari 488, the Portofino and other Ferrari models. The engine is a 3.8-litre 90° twin-turbocharged V8, generating a maximum power output of . The base engine used throughout the trim levels is a 3.0-litre 60° twin-turbocharged V6 generating a maximum power output of . The same engine is shared with the mid-size Ghibli. Both of the engines are designed and assembled by Ferrari. The V8 engine of the Quattroporte GTS differs from the other members of the Ferrari F154 family, in that the Maserati version has a crossplane crankshaft and wet sump lubrication. Turbine housings and exhaust manifolds are integrated in a single piece. The engine also has an overboost function which raises the maximum torque from between 2,000 and 4,000 rpm to between 2,250 and 3,500 rpm. The V6 engine blocks are cast and machined to Ferrari's specifications respectively in Chrysler's Kokomo, Indiana and Trenton Engine Plant from where they are then shipped to the Ferrari factory in Modena, Italy for assembly. Apart from the gasoline engines, a diesel engine is also available in the Quattroporte lineage, a 3.0-litre V6 with a single variable geometry turbocharger, designed and assembled by FCA's subsidiary VM Motori. As of the 2018 model year, the Quattroporte S Q4 was upgraded to raise the maximum power to from its twin-turbocharged V6 engine. The GTS also received a power upgrade and now generates a maximum power output of from its twin-turbocharged V8 engine. The Quattroporte GTS can accelerate from 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. Transmission All engines are mated to a ZF-supplied 8HP70 8-speed automatic gearbox, with four-wheel drive available on the V6 in left-hand drive markets only. The V6 four-wheel drive Q4 drivetrain is the same as that in the Ghibli. Attached to the end of the 8-speed transmission is a transfer case, containing an electronically controlled multi-plate wet clutch, which sends power through a drive shaft to an open differential bolted to the oil pan. During normal operation the car is rear-wheel drive only; when needed the system can divert up of 50% of engine torque to the front wheels. See also