Highs Beautifully designed body, exceptionally luxurious interior, totally customizable. Lows Inefficient engine, lacks driver-assistance tech, doesn’t have a sporting bone in its body. Verdict With the top down, the Dawn is a perfect way to catch the eye. The Rolls Royce Dawn has a huge 6.6 litre twin-turbo V12 engine under its fantastically designed hood, and cant dish out a hefty 563 HP. Having a combination of stylishness and power is surely a heavenly experience.