Mercedes-AMG C 63 vs Mercedes-AMG GT: How Do They Stack Up Against Each Other?

First thing's first: one's a two-door coupe, the other is a four-door sedan (or five-door estate if you opt for the T-Model). Apples and oranges. But even so, there are a few things except for the three-pointed star that make them somewhat similar. We'll point out the engine first: it's a 4-liter biturbo vee eight.

Theory: exhaust gases enter the turbocharger, spin it, witchcraft happens and you go faster.

Although Mercedes-AMG calls it a biturbo, the setup is actually a twin-turbo because both units are the same size (twins). Traditionally, a biturbo engine is using a small and a big turbine for relentless torque throughout the rev range. Although the powerplants are virtually the same, the AMG GT's was dubbed M178, while the C 63's was named M177. Power?

The base Mercedes-AMG GT is a loud and proud German bruiser with its 462 ponies at 6,000 rpm and 600 Nm (442 lb-ft) between 1,600 and 5,000 rpm, while the base Mercedes-AMG C 63 sedan is boasting with 476 horsepower from 5,500 revs and 650 Nm (479 lb-ft) between 1,750 - 4,500 rpm.

As for curb weight (90 percent full fuel tank minus the driver's 68 kilograms and 7 kilos of luggage), the AMG GT tips the scale at 1,540 kilograms (3,395 pounds), whereas the AMG C 63 weighs 1,640 kg (3,615 lbs), translating to a difference of 100 kilos.

In terms of performance, 0 to 100 km/h (62 mph) is doable in 4 seconds dead for the AMG GT, meaning that the C 63 sedan is a tenth of a second slower. In addition to that, the AMG GT is boasting with a top speed of 304 km/h (188 mph), whereas the C 63 is electronically limited to "just" 250 km/h (155 mph).

Whatever. What about the hotter S versions? How do these stack up?

Well, the Mercedes-AMG GT in S guise packs 510 horsepower at 6,250 rpm and 650 Nm (479 lb-ft) of torque between 1,750 and 4,750 rpm. The C 63 S, however, churns out the same horsepower figure at 5,500 rpm and 700 Nm (516 lb-ft) from 1,750 revs to 4,500 rpm, so it's that little more punchy. Weight? In comparison to the 1,570 kg (3,451 lbs) of the AMG GT S, the C 63 S weighs 1,655 kg (3,648 pounds).

Despite the previously mentioned figures, there is only a 0.2-second difference in terms of 0 to 62 mph (100 km/h) between the two, with the AMG GT S capable to hit that speed in just 3.8 seconds and the C 63 S following close behind at 4 seconds. As for top speed, the AMG GT S trumps its four-door sibling with an unrestricted 310 km/h (192 mph).

Anything else?

A big differentiating element between the two comes in the form of the transmission. The AMG GT's vee eight is coupled to what Mercedes calls Speedshift DCT 7-speed sports transmission, a double-clutch automatic in plain English. In comparison, the C 63 is fitted with a heavily revised Speedshift MCT 7-speed transmission, which is a multi-clutch auto. Of course, both gearboxes can be tailored by the driver to swap cogs smooth or in an aggressive manner by pressing buttons on the center console. In addition to that, the more spirited driver will love that both models come with flappy paddles as standard.

Porsche did dynamic engine mounts first…

…but nevertheless, both Mercedes-AMG models get the trick piece of kit as well. However, the AMG GT improves on Porsche's design by offering active damping for both the engine and transaxle gearbox, while the C 63 only gets dynamic engine mounts on the S variant. Another big technical detail you need to know is that base variants of the AMG GT and C 63 lose, in theory, at driving dynamics because only the S variants get electronically controlled locking differentials at the rear, together with independent wheel carriers, bearings and AMG elastokinematics.

Last but not least - the cabin design

Just like the exterior design, the cabin is a big detail as well. Yes, the two-door architecture and the V8-styled transmission tunnel of the AMG GT are to die for, but the Mercedes-AMG C 63 isn't dreary even though it's more simple in appearance inside & out.

Elements such as the steering wheel, pedals, media screen, instrument cluster, air vent design and some dash-mounted physical buttons are more or less the same, but the C 63's cabin is more minimalistic and airy, sort of better to spend time in on a daily basis.

The bottom line is that what you can admire in the photo gallery below are two very different vehicles at first glance, but look beyond the Mercedes-Benz badges and you'll find very similar bits and bobs. If it were your money, what would you take home - the Mercedes-AMG GT or the Mercedes-AMG C 63?