Bentley Mulsanne convertible concept debuts

Bentley will expand the Mulsanne lineup with a glitzy convertible version, previewed by a concept that debuted at Pebble Beach. The British droptop would likely share mechanical pieces with the coupe, meaning a twin-turbo 6.75-liter V8 making 505 hp and 752 lb-ft of torque paired with an eight-speed automatic and rear-wheel chassis. Technical specifications were not confirmed.

Hyundai HCD-14 Genesis concept [w/Gallery]

Hyundai has unveiled its HCD-14 Genesis concept at the 2013 North American International Auto Show (NAIAS). The HCD-14 Genesis concept provides a glimpse of Hyundai's future design direction and features the carmaker's latest technologies, such as eye-tracking and gesture-based controls. At the front of the concept brushed metal grille surfaces feature with a deep vertical grille opening while LED daytime running lights are integrated into the bottom of the fender.

Nissan Sentra wrings out 1 mpg more to sweeten payout

Engineers at Nissan Motor Co. are scurrying to eke another mile or two per gallon out of their vehicles to win customers who come looking for federal cash-for-guzzlers money. "We want as many of our products as possible to pop up on the shopping list," Nissan North America spokesman Brian Brockman says.