Which Is The Better SUV; Mercedes-AMG GLC 63 S Or Alfa Romeo Stelvio Quadrifoglio?

The Mercedes-AMG GLC 63 S and Alfa Romeo Stelvio Quadrifoglio are two of the finest performance SUVs on the market. Which is the best? Throttle House is here to answer that question.

When looking at the spec sheet, the two are quite evenly matched. Fitted beneath the skin of the GLC 63 S is a twin-turbocharged 4.0-liter V8 engine delivering 503 hp and 516 lb-ft (700 Nm) of torque. This grunt is sent to the pavement through the company’s nine-speed automatic transmission and 4Matic+ all-wheel drive system.

Mercedes-AMG quotes a 0-62 mph (100 km/h) time of 3.8 seconds and an electronically limited top speed of 174 mph (280 km/h).

Also Read: Facelifted 2020 Mercedes-AMG GLC 63 & GLC 63 Coupe Promise Sharper Handling

By comparison, the Alfa Romeo Stelvio Quadrifoglio uses a Ferrari-built 2.9-liter twin-turbo V6 with 503 hp and 442 lb-ft (600 Nm) of torque. It connects to an eight-speed auto ‘box and all-wheel drive, and can reach 62 mph in 3.8 seconds and a 177 mph (285 km/h) top speed. In terms of performance then, it’s hard to pick between the two.

However, there are areas where the GLC 63 S establishes itself as the better-rounded package. As these reviewers note, the interior of the Stelvio Quadrifoglio is far below the standard of the Mercedes. It squeaks and rattles and simply doesn’t have the same level of refinement as the Mercedes-AMG. The GLC 63 S doesn’t suffer from such issues and is clearly more premium.

If you had the money, which of the two would you prefer? We think the Mercedes is the logical choice but if you want an SUV filled with passion, it’s hard to beat the Alfa.


  • Stephen G

    Other reviews fail to mention a squeaking interior on the Alfa. The Alfa is better looking, Ferrari under the hood, my grandma drove a MB. Alfa is my pick.

    • KenjiK

      IMO the Alfa is ugly.

    • Rahul Mandala

      Mercedes AMGs are also exhilarating to drive. Any age group can drive a Mercedes, not just old people. GLC63 is the actual handsome one of the two. There is a badass V8 under the hood. The AMG is solidly built too.

  • Nobody

    Both will be in the shop A LOT!

    • javier

      i have a gla45 and it has been pretty good, alfa is rock bottom

      • Nobody

        My ML500 was JUNK! My current c230k is doing all right at 140K miles though.

        • TheBelltower

          Mercedes stopped making the ML500 fifteen years ago. This was their first mainstream SUV entry. For reliability, this was probably among the worst generational era in the company’s history. Both older and newer Mercedes are better.

    • Jaxx Brat

      Ive owned and do own a Benz SUV and dont need a lot of shop time..its a reason why i buy them..im leaning toward the GLE hybrid.


    Alfa Romeo Stelvio Qv !

  • Jim Parsons

    Wtf. There are no squeaks and rattles! ? and get off the old Alfa cart. The new Alfa Romeo models are reliable!

  • maserati123

    I wound take the Alfa with my eyes closed. F the Merc,plus it’s UGLY.

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