Fuel-economy figures for the 2013 Bentley Continental GT V-8 and GTC V-8 convertible have been released, and the car’s downsized engine delivers better fuel efficiency than that of the twelve-cylinder Conti. The GT and GTC V-8 are new for 2013, and both get a 500-hp, twin-turbocharged 4.0-liter V-8 engine instead of the normal Continental’s 567-hp, [...]