Sleeper cars (aka Q cars in Britain) are big news for us lot. While it's great to speed away from your fellow motorist at the lights in your sporty Porsche Cayman , that fleeting victory warmth fades quickly. Unless, however, you've beaten your opponent in a sleeper , a car which possess about as much street credit as a 'lady of the night.' We usually associate sleepers with cars such as the Volkwagen Passat 3.2 4MOTION, Mitsubishi Galant VR-4 and third-gen Mercury Marauder. They're understated family buses, but boy, do they pack a punch.If we're all agreed that these cars are indeed great sleepers, what category would we pigeon hole this Viper-engined 1930s Rolls-Royce? Hyper-sleeper? Maybe? Yeh, we'll go with that last one... This retro-mod Roller super-sleeper is powered by an, which produces 500bhp and a colossal 535lb ft of torque.Of course, strapping such a monstrous engine to a 1930s classic would be like- tempting, but you know you'll get yourself in a whole world of trouble. That's why Viper Specialty Performance have built aand drivetrain onto which an original 1930 Roller body is draped. The car - now 99 per cent completed - even features original wire wheels, air-conditioning and a manual gearbox, the latter of which was the owners preference.Looking at this Viper Club Of America forum thread, this super-sleeper is no hot-rod, rather a highway cruiser and show car.