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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.

Bugatti Veyron Super Sport speed record cancelled by Guinness

The title of the world’s fastest car held by the Bugatti Veyron Super Sport has been removed from the Guinness World Records. But, nearly three years on from when the Veyron Super Sport achieved its world record run of 267.81mph, Guinness World Records have decided that it’s invalid. It seems the heirs to the McWhirter twins have discovered the Veyron Super Sport Bugatti used for their record setting run wasn’t a standard production car, but that Bugatti had removed its speed limiter.

Hyundai i20 WRC starts testing

Hyundai has been busy plotting its return to WRC Rallying for 2014, but so far it’s all been about behind the scenes work on building an i20 capable of taking on the rally world and gathering a team that can make it a success. But with the first official outing for the i20 due in January 2014 in Monte Carlo, Hyundai has finally taken their i20 WRC out in the world to give it some proper testing outside the workshop, Hyundai have been playing on a private testing ground to check out the i20′s systems, followed by a comprehensive testing session to work on different setups and gather data, with a major focus on the i20′s 1.6 litre turbo which, until now, hadn’t been run in the car outside Hyundai’s R&D. Hyundai say all went well over the 55okm of testing across three days, a prelude to a full programme of testing in the coming months as Hyundai get closer to their official debut.