Volkswagen XL1

This, remarkably, is the production version of the Volkswagen XL1, the most fuel-efficient production car in the world, a car we'll see in Geneva in a little over a week. Barely changed from the concept version shown at the Qatar motor show two years ago, the production XL1 is the first production result of VW's 1-liter project – to design a car that uses less than 1l/100km (282.5mpg imperial) – that started with the lozenge-shaped, tandem-seat 2003 1L and the later L1 of 2009. The XL1 actually beats that by sipping just 0.9 liters with CO2 emissions of 21g/km.

New Routemaster bus hits London streets

The very first new Routemaster hybrid bus began its first day of service in London today. The bus, whose exterior and interior were designed by Londoner Thomas Heatherwick, retains the distinct character of the old Routemaster – British as the London taxi and red telephone boxes – but is far more modern in its design and construction. The new Routemaster's main design features are its three sets of doors and two staircases, which it is hoped will ease the strain during rush hour in regards to alighting and entering the bus.

2015 Cadillac Escalade interior revealed

Cadillac teased the new Escalade last week, but today's shot is an uncamouflaged look at the interior, giving us a good idea of what the new luxo-barge will look like from the driver's seat. Caddy says the new interior combines handcrafted elements with new technology, using the company's cut-and-sew technique. The central part of the instrument cluster looks similar to other current Cadillacs with the CUE system and swipe-touch buttons.