It sounds a little odd at first but you quickly get used to it. Whereas the old Bentley Continental GT used to awaken from its slumber with the confident and sonorous rumble of a 12 cylinder engine, now what you often hear is the hum of an electric motor. This is because the near mythical silky-smooth 12 has been replaced by a lusty hybrid V8 with a set of turbochargers. Why is that? Well the British luxury car company has launched its new, now fourth-generation Gran Turismo at prices starting at €246,000 in Europe, with a V8 under the bonnet. It may not be as thrilling to the ears as the old …