The outgoing 2020 C63 S had 503 hp and 516 lb-ft of torque, whereas the new C63 S E -Performance has a massive 671 hp and 752 lb-ft of torque. Even with the alarming 4,700 lb curb weight, that is more than enough punch to slingshot you down the street. Without hybrid assistance taken into account, the 2.0-liter turbocharged engine produces 469 01ubavp.