Mercedes C 63 AMG Coupe revealed – will it beat the BMW M4?

Boyan Marinov
August 19, 2015

The new C 63 AMG Coupe and C 63 AMG S Coupe will be officially unveiled at the Frankfurt International Motor Show in September 2015

This is the new Mercedes-AMG C 63 Coupe – the fastest, most driver-focused version of the Mercedes C-Class Coupe.

There are no official prices, but being a rival to the BMW M4, the Audi RS5 and the Lexus RC-F, we expect the new C 63 Coupe to cost around £60,000.

C 63 AMG Coupe Engine

The new C 63 Coupe features a V8 engine – just like the previous car – although the size of the engine has decreased from 6,200 to 4,000cc. The old saying “there is no replacement for displacement” might pop into your mind, but the engineers from AMG have given the new V8 two turbochargers to help it compensate for the drop in size. The engine is also used in the fastest Mercedes currently on sale – the AMG GT – so you can expect the C 63 Coupe to be incredibly fast.

The two turbos are mounted between the cylinders, which should improve throttle response and reduce turbo lag compared to conventional turbocharged engines. 

There are two Mercedes-AMG C 63 Coupe models to choose from – the “standard” C 63 AMG and the quicker C 63 AMG S. The latter will have 510hp and will be able to sprint from 0-62mph in 3.9 seconds and on to a limited top speed of 155mph, or 185mph if you go for the optional AMG Driver’s package. The standard non-S car will make do with 476hp and a 0-62mph time of 4.0 seconds.


The C 63 can be already be bought as a saloon or estate, but this new coupe will be the most driver-focused version and promises to deliver the best performance and feel.

One thing that could potentially harm that is the use of electric power steering, rather than the old-school hydraulic system used in the previous model. Hydraulic systems tend to give a better idea of what the front wheels are doing, but there have been good electric steering systems and bad hydraulic ones, so until the major car publications have tested the new system it’s too soon for conclusions. 

The suspension set-up is completely different from what you get in the regular C-Class Coupe too. Everything is reinforced and stiffer to help cope with the cornering and acceleration forces, which Mercedes says will be the highest in any C-Class.

For an extra cost, buyers can equip the C 63 Coupe with adaptive dampers. They have several driving modes and Mercedes says that at the push of a button the car can be made comfortable enough for long journeys or be able to lap the Nurburgring faster than one of Mercedes’ most successful racing cars of the 1990s.

Many performance cars use their brakes to control wheel spin in corners, but after a few laps on a race track the brakes overheat and become useless at controlling wheel spin as well as stopping the car. To address that, Mercedes is offering the C 63 Coupe with a mechanical limited-slip rear differential that will help the car accelerate hard out of corners without wheelspin. The even more performance-focused C 63 S Coupe will have an electronically controlled mechanical limited-slip differential.

The C 63 Coupe’s stability control program also has several modes of operation and it can be completely switched off for trackdays.


The C-Class has arguably the most luxurious interior in its class and the AMG Coupe expands on that by adding even higher quality aluminium and carbon-fibre materials.

Mercedes will also offer optional race-style seats – these have a lower seating position as well as body-hugging support. The standard leather sport seats have already impressed critics in the C63 saloon and have been praised for being very supportive and should offer good long-distance comfort.

The main difference between the C 63 Coupe and the saloon and estate versions is the sporty-looking sloping roofline. The downside of this stylish feature is that rear passengers will be short on headroom in the Coupe version.

AMG C63 Coupe vs BMW M4

The C 63 AMG Coupe’s closest rival is the replacement of the BMW M3 Coupe – the M4.

The BMW M4 is described by reviewers as a very complete package and a car of many talents, however, the new C 63 AMG Coupe seems to edge in front of it in a lot of aspects – on paper at least. The C 63 is 0.2 seconds quicker to 62mph and has a higher top speed.

The M4 is criticised for the artificially generated noise it pumps in the cabin to compensate for the sound of its 3.0-litre straight six. On that front, the C63 Coupe should be a much better performer – it has flaps in the exhaust system that modulate the sound constantly. If it sounds like the C 63 saloon, then it’ll be onto a winner.

Where BMW might snatch some points back is in the way the M4 drives. The M4 is a very capable sports car and it weighs just 1,490kg. The Mercedes is a fair bit heavier at 1,710kg, so it’s onto the back foot here. That extra weight will be not be a problem for the torquey engine, but the laws of physics suggest the C 63 might be slower around a racetrack.

Which of the two you choose will be down to personal preference – they both do things differently. The M4 is a precision tool capable of incredible cornering speeds, but critics say it lacks character. The C 63 AMG Coupe is likely to be more of a straight-line performer and the sound it’ll make will put a huge grin on your face. That’s one twin test we can’t wait to see.