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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.

Race-ready Dodge Viper SRT10 ACR-X revealed

The Dodge Viper special editions continue, and on Thursday a turnkey race car, called the Viper SRT10 ACR-X, broke cover. It's not street-legal and is upgraded with a slew of performance modifications aimed at racing enthusiasts. Power grows by 40 hp, to 640 hp, for the 8.4-liter V10.

Spyker C8 Aileron Spyder (2009) first pictures

By Gareth Evans First Official Pictures 17 August 2009 12:30 Dutch supercar maker Spyker unveiled a prototype for its forthcoming C8 Aileron Spyder at the 2009 Pebble Beach concours d'elegance. It's a drop-top version of the company’s hand-crafted C8 Aileron and production versions are due early in 2010. There's a coupe version as well - which was unveiled at this year's Geneva motor show - and together the two cars mark Spyker's second generation of supercars after the original C8s.