(http://media.il.edmunds-media.com/bentley/continental-gt/ns/bentley_continental-gt_actf34_ns_120911_196.jpg) Bentley supplements its mighty 631-horsepower 6.0-liter W12 engine with a potent new twin-turbo 500-hp 4.0-liter V8 in the Continental GT Coupe and GTC Convertible.
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