Mercedes-Benz GLC-Class vs Alfa Romeo Stelvio

What's the difference?

Like I said right from the start, this new, hybrid version of the AMG GLC63 is technically superior to the model it replaces in every meaningful way. It is faster, more powerful and more fuel efficient and therefore a better performance SUV than the model it replaces.

Is it a better model than the one it replaces? Ultimately that will come down to how much stock you put into the soundtrack and your feelings on an AMG not powered by a V8 engine.

Because if you can see past that, then the AMG GLC63 is an absolutely fantastic performance SUV. Not only does the new powertrain make it faster in a straight line, but the chassis is very well-balanced, making for an engaging driving experience.

For those who can look past the smaller engine they will be rewarded with an incredibly fast and rewarding-to-drive member of the AMG family.

Note: CarsGuide attended this event as a guest of the manufacturer, with travel, accommodation and meals provided.

The Alfa Romeo Stelvio Veloce is the car you get when you want a sports car but happen to have a kid or two. Its ride comfort is on the lower end but it has heaps of power and enough features that it manages to slide into its price tag without feeling too cheeky. The back seat’s size will limit this to smaller families, though. And I would prefer to see better tech at this grade level, so this gets a 7.1/10 from me.

My son didn’t spend much time in this one but he liked the red paintwork. My mum, however, loved the power and sexy packaging. She gives it an 8/10.

The GLC63 is unmistakably an AMG from the moment you first lay eyes on it. That’s thanks to the AMG-specific elements, starting with the grille with vertical strikes and the AMG crest on the bonnet; which is now a signature item for the performance sub-brand.

The GLC63 is also fitted with the Night Package II design kit; this adds a darkened grille and black chrome badging to further enhance its visual appeal.

The AMG-specific alloy wheels and more aggressive stance do mean the GLC63 stands out from the rest of the GLC range, helping it look fast even when it’s standing still.

While the Veloce has had a facelift, the changes are so minor I would dare to ask, why bother?

The daytime running light signature has been tweaked but only die-hard Stelvio fans will notice it. I do like the larger 12.3-inch digital instrument display but surprisingly the multimedia screen remains on the smaller side at 8.8 inches.

Otherwise, there’s no denying the Veloce looks like an Alfa Romeo, staying true to its Italian heritage. It’s solid, with a 1903mm wide stance, but so robust that it moves away from words like 'sleek' or 'sexy'.

The black grille, 20-inch alloy wheels and red brake calipers make it look sports car mean and hint at what's under the bonnet.

The interior looks well made and it's got a bat cave element with the black headliner and panoramic sunroof. There's a plethora of soft touchpoints throughout and the circular air-vents found in both rows add some flair.

Overall, though, the interior is understated and if you’re looking for something as flashy as the exterior, you may be disappointed.

Inside the GLC63 is clearly a derivative of the rest of the range, with its C-Class-inspired design and layout, but there’s enough AMG-specific elements to ensure it looks and feels special. This starts with the AMG steering wheel, which comes not only with a thick rim wrapped in Alcantara, but also some AMG special dials to adjust the various performance settings for the powertrain, suspension and transmission.

Then there are the AMG-specific seats, which look good and offer good support for the driver and front seat passenger. The rear seats offer decent space for what is a mid-size SUV, with room enough for two adults or teenagers or three smaller kids.

Those in the back aren’t particularly well looked after though, with only rear air-con vents and small door pockets but no USB charging ports or other small item storage.

The boot is 590 litres, down from 620L in the rest of the range, thanks to the addition of the rear-mounted electric motor. There’s also no room for the temporary spare the rest of the GLC range gets and instead you have to make do with a puncture repair kit.

The front row benefits the most in terms of space and features. I have stacks of headroom and legroom in the front seat and didn’t feel like I was too close to my passenger this week.

I like the comfortable electric seats and the fact you can adjust the side bolsters and under-thigh support.

Individual storage options are on the slim side throughout the car and it was something my mum and I found annoying on our road trip because there aren’t a lot of spots to put your little items up front. Think snacks, sunglasses, lip balm etc.

The two cupholders are really drink bottle holders because they’re too large to fit a small takeaway cup without popping the lid off but I like the large storage bins in each front door.

It's a tight squeeze in the back seat for my 168cm (5'6") height and that’s behind my driving position! It could feel a tad cramped back there for those with longer legs.

It’s also a bit awkward getting in and out of the back seat because of the large wheel arches.

The storage bins in the doors are too small to hold a drink bottle but the middle armrest has two cupholders and a phone holder.

Charging options are fantastic up front with two USB-A ports, one USB-C port, a 12-volt socket and a wireless charging pad to choose from. You even get an 'aux' jack, too.

The amenities in the back seat are okay and you get a couple of net map pockets, reading lights, a USB-A and C port, as well as directional air vents.

This Alfa has a no-nonsense approach with the other tech, though. I usually don’t mind that but the touchscreen multimedia system is a little too no-nonsense for this spec-level.

I found it to be laggy and too small. It also regularly turned itself off and rebooted. This happened a few times while needing satellite navigation directions, which was annoying.

Also on the sat nav, you can’t search for a general name of something, like a business, you have to input an address which meant using my iPhone anyway. It’s great that you get wired Apple CarPlay and Android Auto, though.

The digital instrument panel looks upmarket but isn’t properly customisable and I was disappointed the ambient lighting package only meant that there are lights in the footwells and a tiny overhead light. Adding some extra lighting would have transformed the night-time driving experience.

The boot is the highlight for me because you get a decent capacity at 499L. The load space is level and I like the back row's 40/20/40 split-fold. We had plenty of room on our road trip for luggage and shopping.

You get a temporary spare tyre and a retractable cargo blind. The latter is stiff enough to double as a shelf which is handy and a handsfree powered tailgate comes standard, as well.

There are three models for the Stelvio and ours is the mid-spec Veloce grade, which will cost you $82,950, before on-road costs. The pricing should make it competitive compared to its rivals but the features list isn’t as robust as it could be.

The interior gets most of the big-ticket items with leather upholstered sports front seats, extended leather trim on the doors and dashboard as well as a heated steering wheel.

Both front seats are electric with six-way power adjustment, powered side bolsters and four-way adjustable lumbar support. They also feature a heat function and extendable under-thigh support.

The luxury items continue with the panoramic sunroof, real aluminium accents throughout and a premium Harman Kardon sound system that boasts 14 speakers.

Other standard features include full LED adaptive 'Matrix' headlights, aluminium sports pedals, dual-zone climate control, keyless entry, push-button start and a handsfree powered tailgate.

It's the technology that lets the Stelvio down but I'll go into that later.

This is what lies at the heart of the AMG GLC63’s success or failure. As I mentioned at the beginning, the previous generation’s 4.0-litre twin-turbo V8 has been replaced by an F1-inspired plug-in hybrid powertrain.

But don’t think that means AMG is suddenly focused on efficiency over performance. When AMG says the powertrain is inspired by the brand’s success in Formula 1 racing, what it means is the battery and electric motor provides a significant performance boost to support the internal combustion engine, not just save fuel.

To that end the combination of the turbocharged 2.0-litre four-cylinder petrol engine and the rear-mounted electric motor produces an impressive 500kW and 1020Nm. That’s a massive jump over the 375kW/700Nm made by the outgoing V8.

The Veloce has a 2.0-litre, four-cylinder turbo-petrol engine that gives a maximum power output of 206kW and 400Nm of torque. It’s an all-wheel drive and has an eight-speed auto transmission which is very smooth. 

Checking out the specs I didn’t think this would be as powerful as it is. But it’s really fun when you need to put your foot down! I mean, it can go from 0-100km/h in just 5.7 seconds.

Mercedes makes no secret that the battery is designed for performance, not saving fuel. It only has a 14km EV range but can recharge quickly on the move to provide a power boost when needed.

But despite all that, the GLC63 is actually significantly more fuel efficient than the old V8, using a claimed 7.3L/100km, which is a massive 4.9L/100km improvement over the old model. Although, on our day-long test drive we didn’t manage to come close to that claimed figure and instead saw returns around 11L/100km, albeit after a lot of spirited open-road driving.

The official combined cycle fuel economy figure is 7.0L/100km and my real-world usage came to 8.4L/100km.

I drove our test model hard but did A LOT of open road driving - 2051km to be exact - so I was happy with the average but I would expect it to be higher in the city.

Based on the official combined cycle number and 64L fuel tank, you theoretically should be able to get a driving range of around 914km but my real-world tests see that figure come in closer to 700km.

Alfa Romeo recommends a minimum 95 RON petrol be used for the Stelvio.

Anyone who still believes in the adage ‘there’s no replacement for displacement’ hasn’t driven a modern turbocharged and hybridised engine. The GLC63 is a demonstration of the metaphorical and literal power of modern technology, combining an extremely efficient and potent internal combustion engine with an electric motor to make enormous real-world performance.

To be blunt, the GLC63 feels like a rocketship out of corners, launching with a ferocity and relentlessness the old V8 simply can’t match. It shouldn’t come as a surprise, a mid-size SUV with 1020Nm was always going to have plenty of performance, but even so it’s a shock to the system every time you give the GLC63 full throttle. Officially AMG claims it takes just 3.5 seconds to run 0-100km/h and has an electronically limited top speed of 275km/h - mighty impressive figures for a five-seat mid-size SUV.

To help get all that torque to the road, AMG deploys torque distribution technology that allows for it to be split an even 50/50 front/rear all the way to 100 per cent to the rear tyres.

Other technologies deployed to enhance its handling include AMG Ride Control suspension with adaptive damping and rear-axle steering. There’s also eight AMG Dynamic Select driving modes and four AMG Dynamics settings (Basic, Advanced, Pro and Master), so it’s a complex vehicle that is designed for the enthusiast.

While it’s easy to drive around town, once you get out on the open road you can really get a sense of the GLC63’s performance potential. Beyond just its powertrain the suspension offers good body control and the rear-axle steering helps it feel agile and responsive. 

It’s not perfect though. At times the complexity of the system does lead to some hesitation when you put your foot down. It certainly lacks the linear power delivery of the old V8 and makes for a slightly trickier driving experience at times.

As for the sound, which is one of the biggest elements missing from the V8, Mercedes has added AMG Real Performance Sound, which features a pressure sensor in the exhaust that picks up on the engine note and plays it through the speaker system. It certainly helps make for a louder, more noticeable engine noise, but it still sounds more like an A45 than the previous GLC63 and for many would-be buyers, that’s a major turn-off.

The Veloce is downright fun to drive because of how damn responsive it is. There is plenty of power, so much so, that you’ll look forward to hitting the open road. 

The sporty steering makes for sharp handling and the car moves decisively. I have felt confident all week that it would do what I wanted it to do. It's wide stance also makes it hug the road like an old friend.

However, the suspension is also sporty, aka firm! The padded seats help soften the impact when you hit a bump but you’ll still know it when you hit one. There's also a resonating 'ker-thump' in the cabin, in case you didn't feel it.

The big thing that marred the driving experience for me, at least for a longer trip, is how loud road and wind noise are at higher speeds. It’s loud enough that you need to raise your voice to talk, which I didn’t enjoy.

The Veloce earns back points with how easy it is to park and it handles those stupidly small hotel car parks extremely well.

I don't rate the reversing camera, though. The quality of the image is terrible for this grade-level.

The Stelvio has most of the major items that I like to see on a family car and the standard safety features include adaptive cruise control, forward collision warning, driver attention monitor, traffic sign recognition, lane keeping aids, blind-spot monitoring, rear cross-traffic alert, a reversing camera, daytime-running lights, front and rear parking sensors, and a tyre pressure monitoring system.

It's important to note though that the safety systems only scored a 60 per cent with ANCAP.

It has autonomous emergency braking with pedestrian and car detection and is operational from 7.0 - 200km/h.

The Veloce has a maximum five-star ANCAP safety rating but it was done ages ago in 2017, which means it will expire this December. It also only has six airbags, which is low for a family car but the curtain airbags cover the back row.

There are ISOFIX child seat mounts on the outboard rear seats and three top tethers in the second row but two seats will fit best.

You can just squeeze a 0-4 rearward facing child seat in but it will encroach on front passenger comfort.

The GLC63 is covered by Mercedes Australia’s usual five-year/unlimited kilometres warranty.

As for maintenance, Mercedes offers service plans, spanning three to five years. Three years will cost you $5025, $6455 for four years and five years is priced from $7180. Servicing intervals are 12 months or 20,000km, whichever comes first.

The ongoing costs aren’t too shabby on the Stelvio because it comes with a five-year/unlimited km warranty and you also get five years roadside assistance.

It’s a 24/7 complimentary service that covers a host of items but check out the terms and conditions for more information.

There’s capped priced servicing for five years or up to 75,000km, whichever occurs first.

Services cost an average of $573, which is competitive for the class and servicing intervals are good at every 12 months or 15,000km, whichever occurs first.