New Alfa Romeo Stelvio Quadrifoglio vs Mercedes-AMG GLC 63 S

These hot SUVs from Alfa Romeo and Mercedes-AMG are thrilling as well as practical. Which one best puts the 'sport' in SUV?...

Alfa Romeo Stelvio Quadrifoglio rear seats

Space and practicality

Front space, rear space, seating flexibility, boot

Despite being fitted with optional panoramic sunroofs (£1250 on the Stelvio and part of a £2595 pack on the GLC), both of our contenders offer adequate front head room even for tall adults and plenty of interior width for comfort.

Mercedes AMG GLC 63 S rear seats

However, rear seat passengers will be happier in the Stelvio; although you get a little less head room, there’s more leg room and a smaller central tunnel for middle passengers to contend with. Both rear benches split and fold in a 40/20/40 arrangement, so you can carry long items as well as a couple of passengers in the rear.

Both cars’ boots can accommodate seven carry-on suitcases, but it’s a real squeeze in the GLC, whereas there’s room to spare in the Stelvio. In both, the rear seatbacks can be folded down via switches or handles just inside the boot entrance.

Alfa Romeo Stelvio Quadrifoglio

Alfa Romeo Stelvio boot

Boot is square, with a minimal loading lip and a handy cavity in the floor to stop small items from skating around. Thick rear pillars limit visibility and make the rear seats quite gloomy, but there’s more space overall than in the GLC.

Boot 525-1600 litres  Suitcases 7

Mercedes-AMG GLC 63 S

Mercedes AMG GLC 63 S boot

GLC’s boot is very wide at its rearmost point, allowing you to slot in a set of golf clubs without too much effort. Front seats are supportive when cornering but can’t match the Stelvio’s optional buckets for holding you in place.

Boot 550-1600 litres  Suitcases 7

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