The 63 thing has historical significance to Mercedes, the original big hot rod euro car the 300sel 6.3. My CLS63 has a 6.2 V8, but it has 6.3 badges, supposedly for the historical reason. When they went to the turbo motors they kept the number as the equivalent displacement that an NA motor would be for the power it makes.
Check out 2018 Mercedes-AMG S63 Sedan review: BuzzScore Rating, price details, trims, interior and exterior design, MPG and gas tank capacity, dimensions. Pros and Cons of 2018 Mercedes-AMG S63 Top speed. Acceleration (0-100 km/h) Start request. • Power enhancement . • Vmax delimiter . • incl. part approval . • incl. engine warranty . Mercedes S 63 AMG (W 222) with standard 585 hp / 900 Nm receives a tuning extra power of 712 hp and 1000 Nm or Mercedes S 63 S AMG (W 222) 612 hp / 900 Nm receives a tuning extra power of 712 hp A very similar—in this case hand-built—twin-turbo 4.0-liter V-8 makes its way into the Mercedes-AMG S63 this year, where it produces a mighty 603 horsepower and 664 lb-ft of torque. Here again