Mercedes-AMG GLC 63 and GLC 63 Coupe arrive with up to 503 AMG horses

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The Mercedes-AMG GLC 63 and GLC 63 Coupe arrive as the full fat AMG GLC s, complete with 4.0 litre twin-turbo and up to 503bhp. Debut in New York.

We’ve already had the Mercedes-AMG GLC 43 as a swift AMG GLC – and its coupe sibling – but now they get the dial turned up to 11 with these, the new Mercedes-AMG GLC 63 and GLC 63 Coupe.

Long gone are the days when ’63’ meant 6.3 litres (although it was actually 6.2 litres) for the V8 under the bonnet, but here there’s just as much power with the 4.0 litre twin-turbo V8 putting out 469bhp in standard tune and a mighty 503bhp in the GLC 63 S versions.

Aimed at the Porsche Macan Turbo, both the GLC 63 and coupe – regular of S versions – get Mercedes’ 4MATIC 4WD and AMG’s new Speedshift nine-speed automatic.

Mercedes aren’t saying just how quick these new compact SUVs are, but with that sort of power we’d expect to see not much more than 4.0 seconds to 62mph for the GLC 63 S.

All models come with AMG’s Dynamic Select modes – Comfort, Sport, Sport Plus and Individual – and exhaust system with flap technology activated by mode and speed (you can opt for a performance exhaust), AMG multi-chamber air suspension and a mechanical limited slip diff(electronic on the GLC 63 S).

Just in case the speed you pass by and the noise don’t tell the world you’re in a GLC 63, it’s the first AMG Performance car to come with the Panamericana grille as well as front splitter, big sills, rear diffuser, roof spoiler and high-gloss chrome tail pipes.

Heading for a debut this month at the New York Motor Show, both Mercedes-AMG GLC 63 and GLC 63 Coupe will go on sale in the UK in June with first deliveries at the end of the summer.

So far, Mercedes hasn’t managed to get their abacus out to come up with a price for the GLC 63, but it will be a chunk more than the £50k and up GLC 43. There will also be an Edition 1 version of the Mercedes-AMG GLC 63 4MATIC and GLC 63 S 4MATIC.