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

Porsche 911 (2011) the leaked images of the 991

This is the new Porsche 911, and these images have been leaked ahead of the car’s official debut at the 2011 Frankfurt motor show in September. This Porsche 911 actually looks a little different to the current rear-engined icon… Codenamed 991, the new 911 is all-new, and while the silhouette is instantly recognisable (and we’d swear those doors are identical) the bow and stern are obviously altered. It’s the rear that’s changed the most, with ultra-slim LED lights and a much wider but more neatly integrated pop-up rear spoiler.

Concept Car of the Week: Cadillac Voyage (1988)

Once a symbol of America's most luxurious automobiles, Cadillac's image had begun to wane by the mid-1980s, and not even the Pininfarina-designed and built two-seater Allante was enough to excavate the brand's long gone leadership. In an effort to take Cadillac onto the global stage, engineers and the team of designers led by Chuck Jordan began working on the Voyage concept, a rolling laboratory with visionary styling and innovative technology. It was unveiled in 1988 at a technological exhibition in New York thus highlighting that rather than a stylist's dream come true, it was a very serious study towards aerodynamic, performance, handling, comfort and efficiency in an age when automated superhighways would allow fast, safe inter-State travel.

Mercedes AMG GT gets new 503 bhp Twin-Turbo 4.0 litre V8 (video)

The new Mercedes AMG GT (pictured) gets the new 503 bhp Twin-Turbo 4.0 litre V8 We’ve speculated that the new Mercedes AMG GT – and, for that matter, futures ’63′ AMGs – will get a new twin-turbo V8 to provide the power as Mercedes look to move away from the naturally aspirated 6.2 litre V8 in cars like the SLS. And this is it. A new 4.0 litre twin-turbo V8 – the M178 engine – has been developed to replace the 6.2 litre V8 and, in initial tune, develops 503 bhp at 6250 rpm and 479lb/ft of torque from just 1750 rpm.