AMG has been dropping large V8 engines into compact executive cars for two decades now but the recipe is as satisfying as it ever was. The latest such vehicle to rumble through the doors at Affalterbach is the all-new Mercedes-AMG C63, and a higher-output C63 S. Mercedes promises the latter is the fastest AMG-fettled C-Class yet.

The big news is that the C63 finally cedes natural aspiration in favour of turbocharging. A pair of turbos are strapped in the V of the new 3,982cc M177 power unit, both smaller and lighter than the old 6.2. Predictably, it’s also more efficient than before – by 32 per cent – and out-punches the old engine too.

As standard, the C63 now produces 350kW between 5500-6250rpm and 650Nm plateau between 1750-4500rpm. In S form, those numbers climb to a 375kW power peak (2kW more than the outgoing Edition 507 range-topper) and 700Nm.

All this is sent to the rear wheels via a revised version of AMG’s Speedshift MCT 7-speed automatic (now with quicker shifts) and a locking diff – mechanical in the C63, electronic in the C63 S. The S also rolls on wider rubber than the standard car – the C63 features 245/40 R18 front and 265/40 R18 rear tyres to the S model’s 245/35 R19 front and 265/35 R19 rear setup.

The C63 saloon reaches 100km/h in 4.1 seconds – one tenth quicker than the Edition 507 – while the C63 S is a tenth quicker still. Estate versions of each are a tenth slower than their respective four-door counterparts, and top speed is limited to 250km/h across the board.

AMG’s engineering doesn’t stop at the engine. Dynamic engine mounts are used to damp vibration in normal driving, firming up when greater performance and agility is required.

The front four-link suspension features independent steering knuckles and a wider track, while the multi-link rear setup uses independent mounts and increased negative camber. Drivers can select various suspension settings as part of the AMG Ride Control system’s electronically-controlled dampers.

Outside the AMG C63s get all the usual styling tweaks – an AMG grille, a subtle bodykit, and wider bodywork to accommodate the wider track. The front bumper also features deeper airdams to help feed the intercoolers, and the bonnet a pair of raised ‘power domes’. At the rear, a new bumper features cutouts for the quad exhaust pipes.

Inside, deeper, contoured seats replace the usual pews while an AMG steering wheel and AMG dials should reassure drivers that they’ve not accidentally ordered the diesel. As ever, owners can specify various leather treatments and trim finishes to differentiate their car from the next AMG.

Prices haven’t yet been announced but those will follow shortly, with deliveries are expected to begin next year.

– Antony Ingram