This is one of the first reviews of the new Bentley Continental GT Speed Convertible, which had its world premiere back in January. The Conti GT Speed Convertible is powered by the same engine as Bentley's coupe version. This means it has a monster 6.0-litre W12 twin-turbocharged engine under its hood that puts out 616 bhp and 800 Nm of torque. With this massive engine, the GT Speed Convertible is able to rocket from nought to 60 mph in just 4.1 seconds. Its top speed is rated at 202 mph (325 km/h).