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Mercedes-Benz B-Class aerodynamics tested [w/video]

Mercedes-Benz has produced a video testing the aerodynamics of its new B-Class – which it claims is the most aerodynamically efficient car in the world – using a wind tunnel and fluorescent paint. The W245-generation B-Class has the lowest aerodynamic drag in its segment with a Cd of just 0.26, thanks to features such as serrated front wheel arch spoilers, optimized cooling airflow and a Pagoda roof to help airflow over its profile. The car's aero properties were put to the test at the MIRA vehicle test facility in the UK using fluorescent paint in 60mph winds to highlight its flow dynamics, only visible under UV lights.

Land Rover Defender XTech special edition (2012)

Land Rover has announced a stylish new XTech special edition of its timeless Defender 4x4. Despite the Defender’s farmers’ roots, Land Rover has loaded the XTech with a bundle of extra equipment and a series of cosmetic upgrades. So what’s new on the Land Rover Defender XTech?

Porsche 911 Turbo S (2013) at Frankfurt motor show

Porsche has topped off the 991-generation 911 range with a new Turbo and Turbo S model. The forced-induction 911 is the fastest Turbo yet, mixing Ferrari 458 levels of power with new chassis technology from the hardcore 911 GT3. What are the new Porsche 911 Turbo’s performance stats?