The new Mercedes-AMG C63 Coupe represents a big challenge to the likes of the BMW M4, Audi RS5 and Lexus RC F. Following on from the recently introduced C63 saloon and estate, it eschews its predecessor's naturally aspirated 6.2-litre V8 for a smaller, and more efficient twin-turbo 4,0-litre V8. In standard C63 Coupe guise, its engine produces 469bhp and 479lb ft. For the headlining C63 S model driven here, though, the 90deg V8 receives additional boost pressure and other detail changes to generate 503bhp arid 516lb ft. The reserves are fed through a seven-speed Speedshift MCT automatic gearbox, which operates in combination with a mechanical locking differential in the C63 or an even faster-reacting electronic locking diff in the C63 S.
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