Brabus Rocket has typical Mercedes CLS class exterior. 485 cm, long, 185 cm wide, 140 cm high. The engine is twin turbo V12, displacing 6,2 l, which produces 730 hp. The weight is 2020 kg. This car accelerates 0 to 100 km/h in 4,0 s, 0 to 200 km/h in 10,5 s. Maximum speed is 365 km/h. Bugatti Galibier is bigger than Rocket. At least longer, at 537 cm. It has twin supercharged W16 engine, displacing 8,0 l. And produces 800 hp. Weight is not disclosed, although claimed to be small. Cadillac Sixteen is even longer than Galibier, at 567 cm. Its height, at 139 cm, is similar to CLS-class. It has naturally aspirated V16 engine, displacing 13,6 l and producing 1000 hp. The weight of Sixteen is 2270 kg. How do the acceleration and maximum speed of Galibier and Sixteen compare with Rocket? And which of them is the fastest 4-door car?