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

Mercedes unveils powerful new AMG 4.0-litre twin-turbo V8

By John Mahoney Motor Industry 25 July 2014 17:09 Mercedes AMG has released details of an all-new 503bhp 4.0-litre twin-turbo V8 that will help fill the void when the production of its normally aspirated 6.2-litre V8 ends. Lightweight, compact and more efficient than the big 6.2-litre it replaces, the new smaller capacity turbocharged V8 produces 479lb ft from just 1750rpm. The first car to receive the new engine will be the Porsche 911-rivalling Mercedes AMG GT, but other smaller cars like the C63 AMG are also set to benefit from its compact design.

Chrysler vows to rebuild SRT

Ralph Gilles promises that Chrysler Group will be "very choosy" about the cars and trucks that get the SRT performance badge. Gilles, recently named head of SRT, is charged with rebuilding the SRT unit, which languished when Chrysler was owned by Cerberus Capital Management. Three new SRT vehicles, versions of the Dodge Charger and Chrysler 300 sedans and the Jeep Grand Cherokee, will arrive in dealerships this fall, joining the Challenger SRT8.

Bentley Continental GT Speed (2012) first pictures

For the would-be Bentley Continenal owner who can't bring themselves to stoop to the level of the entry-level V8 model, and feel the standard W12 car is too slow, Bentley has created a new Continental GT Speed. Designed to appeal to more driving-focused Bentley customers, there's a package of mechanical, cosmetic and interior changes to push the Conti into full-on supercar territory. So, is the Bentley Continental GT Speed faster than before?