Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Mercedes S 500 Plug-In Hybrid price & specs – costs from £87,965

The Mercedes S500 Plug-in Hybrid arrives in the UK It’s more than a year since the Mercedes S500 Plug-in Hybrid was revealed, and now it’s finally going on sale in the UK and, if your pockets are deep enough, it offers a perfect ‘cake and eat it’ car. Under the skin there’s a 3.0 litre V6 biturbo delivering 329bhp and an electric motor adding a further 116bhp which together give the S500 Plug-in the ability to blat to 62mph in just 5.2 seconds but return official economy of 100.9 mpg and emissions of a measly 65g/km. That combination means that you won’t have to pay Boris to drive through London, and your BIK rate will be a very modest 5 per cent, making the S500 plug-in Hybrid a perfect choice for every board member in the country currently paying 35 per cent on their petrol S500, BMW 7 Series or Audi A8.

Porsche 918 Spyder caught high-altitude testing

The Porsche 918 Spyder first broke cover as a concept at the 2010 Geneva motor show. Since then, we've seen it again and again at various auto shows and track events. Now it's testing at high altitudes in Keystone, Colo.

Hyundai shows its Blue2 hydrogen-fuel-cell vehicle in Seoul

Hyundai Motor Co. has unveiled a hydrogen fuel cell concept vehicle called the Blue2 that takes the South Korean automaker deeper into alternative-drivetrain territory. Hyundai is banking on the car to propel it to a leadership role in the race to commercialize fuel cell electric vehicles, a contest joined notably by such Japanese rivals as Honda Motor Co.