Buick LaCrosse with eAssist priced at $30,820

The freshly stickered 2012 Buick LaCrosse with eAssist will start at $30,820, including destination costs, the brand said on Wednesday. Buick says the 2012 LaCrosse with eAssist is rated at 37 mpg in highway driving, a 25 percent improvement over the 2011 LaCrosse. The improvement comes from eAssist, a mild hybrid system that uses a belt-driven electric motor-generator and a lithium-ion battery pack.

Subaru Impreza Diesel introduced

Subaru has launched the Impreza Diesel in the UK The Impreza is a great car, and slotting in the 2.0-litre Boxer Diesel is a move designed to get the Impreza a whole new market, especially as it’s coming in at a round decent Golf money – a nice round £20,000 for the Impreza 2.0D RC. The 2.0 litre boxer diesel outputs 150bhp and 258lb/ft of torque, and can do 0-60 mph in 8.8 seconds and on to 127 mph. It does 47.1 mpg and emits 155g/km CO2.

Aston Martin Lagonda

The Aston Martin Lagonda name has been resurrected again, but this iteration promises to be far less controversial than the 2009 SUV concept. Created for a select group of Middle Eastern clients, this large three-box sedan (dimensions haven't yet been made available) offers a well-judged balance between the current Aston Martin range and the idiosyncratic 1970s Lagonda by William Towns. Its proportions are very extreme for a luxury sedan, with a cabin sat far rearwards behind a very shallow A-pillar.