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

McLaren P13 – first OFFICIAL details and image

McLaren P13 (pictured) first OFFICIAL details revealed It was only last month that we had official confirmation that the McLaren P13 – McLaren’s more affordable mid-engined supercar – would arrive in 2015 to take on cars like Audi’s R8 and the top end Porsche 911s. Now McLaren has gone a bit further and revealed details of the P13. The McLaren P13 – shown above in a sketch by McLaren’s design boss, Frank Stephenson – looks to take its design cues more from the MacLaren P1 than the 12C – a good thing – and will utilise the same carbon fibre MonoCell chassis as the P1 and 12C as well as a de-tuned version of the same 3.8 litre V8 turbo.

How Google's autonomous car navigates city streets

Google's self-driving car has been on the road for five years now, at various levels of autonomy. From the ease and relative serenity of California's arrow-straight highways, the car drove hundreds of thousands of miles with a greater level of concentration and mastery than the wandering attention spans of humans could accomplish. In 2012, Google shifted from the freeways to the cities, navigating a far more convoluted set of challenges: the slow-speed chaos that comes with any city, any suburb, any place with people and cars in it.

Mazda's rotary engine stalled, not forgotten

Development of the next-generation rotary engine from Mazda Motor Corp., first unveiled three years ago, is making slow progress despite missing emissions targets. A top Mazda powertrain executive said today that the 1.6-liter rotary engine, called the 16X, is about 30 percent more fuel-efficient than the current rotary engine used in the RX-8 sporty car. In fact, the 16X so far performs slightly better than Mazda's standard two-liter gasoline engine, said Mitsuo Hitomi, general manager of the Japanese carmaker's powertrain division.