The 2011 Quattroporte is available in base, S, and Sport GT S trims. The base trim is powered by a 400 horsepower 4.2-liter V8 engine, while the S trim?s 4.7-liter V8 puts out 425 horsepower, and the Sport GT S' 4.7-liter V8 produces 433 horsepower. Each engine is mated to a six-speed ZF automatic transmission. An electronically-controlled Skyhook suspension, standard on the S and optional on the base and Sport GT S trims, automatically adjusts to the conditions of the road. Standard features include directionally-adaptive bi-xenon headlights, heated leather power seats with memory, automatic dual-zone climate control, rear parking sensors and a Bose sound system with hard drive and navigation system. The Quattroporte S adds Brembo brakes and 20-inch wheels. The Sport GTS S features a unique grille and bumpers, lowered sport suspension, MC-Auto Shift software package for racing-style control of gear changes, Alcantara trim on the seats and throughout the interior, and TitanTex (an aluminium-coated titanium fibre fabric) interior trim. Heating, ventilation and massage functions are optional for front and rear seats. A wide variety of alloy wheels, brake caliper colors, and leather and wood trims are available. For 2011, the S trim receives black headlamp surrounds, 20-inch alloy wheels, red painted brake calipers and other features. New packages for the base and S trims group popular options together.