Mercedes-Benz SL-Class vs Ferrari 488

What's the difference?

The new Mercedes-AMG SL63 4Matic+ is guaranteed to turn heads for decades to come. But there’s enormous design and engineering substance underpinning this car’s undoubted good looks. Stunning performance, superb dynamics and top-shelf safety make this a powerhouse GT to be reckoned with.

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

The Ferrari 488 Spider is a brilliant machine. It's properly supercar fast, in a straight line and around corners. It looks stunning, and attention to design detail, engineering refinement and overall quality oozes from its every pore.

Is it the best car I’ve ever driven? Close, but not quite. Others may disagree, but for what it’s worth, I think the Ferrari 458 Italia, in all its high-revving, naturally aspirated glory is still the sweetest ride of all.

Rather than a strict two-seater, this time around the SL adds the flexibility of ‘+2’ rear seating while the previous 'Vario’ folding hardtop has been binned, the new car returning to a traditional, electrically-folding and weight-saving (-21kg) soft top. 

Mercedes-Benz design chief Gorden Wagener started the new model’s development from a ‘clean sheet’ and Mercedes-AMG says “not a single component comes from the predecessor SL, or any other model such as the AMG GT Roadsters”. 

Always a subjective call, but I think this car’s proportions are just about perfect. The lengthy bonnet with its twin longitudinal ‘Power Domes’, raked windscreen and fat haunches create a wide stance and presence that’s almost impossible to ignore.

Aggression, as with the sinister headlights and 21-inch rims, is subtly combined with soft curves along the flanks and around the rear. Note the seamless door handles.

And it’s not all about aesthetics. Active aero has been integrated into the front apron and retractable rear spoiler. Plus the ‘Z-fold’ roof design does away with the need for a separate cover.

The interior is sub-zero cool with slick screens, an 11.9-inch display covering multimedia and a 12.3-inch unit for instrumentation ahead of the driver, being particular highlights.

Turbine-style air-vents at the leading edge of the split-level dash and alloy trim elements are a tip-of-the-hat to SLs past and the deft mix of large flat surfaces with complex curves oozes design confidence.

Launched in 2015, the 488 is the fourth mid-engine V8 Ferrari based on the aluminium space-frame architecture unveiled with the 360 Modena back in 1999, and unlike its Pininfarina-penned predecessors, was designed in-house at the Ferrari Styling Centre, under the direction of Flavio Manzoni.

The key focus this time around was aero performance, including the additional breathing and cooling needs of the 488’s 3.9-litre twin-turbo V8 (relative to the 458’s 4.5-litre naturally aspirated unit); hence the car’s most obvious visual identifiers - substantial air intakes in each flank.

Measuring 4568mm nose-to-tail, and 1952mm across, the 488 Spider is marginally longer (+41mm) and wider (+15mm) than its 458 equivalent. That said, it’s exactly the same height at just 1211mm tall, and the 2650mm wheelbase is unchanged.

Ferrari is a past master when it comes to sneaky concealment of spectacular aero trickery, and the 488 Spider is no exception.

Inside, the design is all about simplicity and focus for the person with the steering wheel in their hands.

Upper elements of its F1-inspired double front spoiler direct air to the two radiators, while the larger lower section subtly pulls flow under the car where carefully tuned ‘vortex generators’ and a yawning rear diffuser (incorporating computer-controlled, variable flaps) dial up downforce without a significant drag penalty.

The ‘blown’ rear spoiler manages air from intakes at the base of the rear screen, its specific geometry allowing a more pronounced (concave) profile for the main surface to increase upward deflection and maximise downforce without the need for an oversize or raised wing.

Those side intakes are divided by a central, horizontal flap, with air from the upper section directed to exits over the tail, pushing the low-pressure wake directly behind the car further back to again reduce drag. Air flowing into the lower section is sent to the turbo engine’s air-to-air intercoolers to optimise intake charge. All brilliantly efficient and tastefully incognito.

Putting the engine in the centre of the car and fitting only two seats doesn’t just pay off dynamically, it delivers the perfect platform for visual balance, and Ferrari has done a superb job of evolving its ‘junior supercar’ with a nod to the line’s heritage and an eye on extending its reach.

The tension across its multiple curved and contoured surfaces is beautifully managed, and the Spider’s crouching stance screams power and single-minded purpose.

Inside, while the passenger might be enjoying the ride, the design is all about simplicity and focus for the person with the steering wheel in their hands. 

To that end, the slightly angular wheel houses a host of controls and displays including a very red start button, driving mode ‘Manettino’ dial, within-thumb’s-reach buttons for indicators, lights, wipers and ‘bumpy road’ (more on that later), as well as sequential max rpm warning lights across the top of the rim.

The steering wheel, dash, doors and console are (optionally) carbon-rich, with the familiar buttons for Auto, Reverse and Launch Control, now housed in a dramatic arching structure between the seats.

The compact instrument binnacle is dominated by a central rev-counter with digital speedo inside it. Readout screens for on-board info across audio, nav, vehicle settings, and other functions sit either side. The seats are grippy, lightweight, hand-crafted works of art, and the overall feeling inside the cockpit is an amazing mix of cool functionality and special event anticipation.

In the context of a high-performance GT, practicality is pretty impressive.

At just over 4.7m long the SL is a sizeable machine and much of its lengthy (2700mm) wheelbase is devoted to making the driver and front passenger comfortable.

There’s plenty of space for that pairing and just enough storage to cope with the ‘things’ they’ll typically bring with them.

Door pockets offer enough room for a few odds and ends, although you’ll struggle with even a medium-size bottle unless you’re willing to lay it down horizontally along the top of the aperture.

A handy lidded bin between the front seats doubles as a centre armrest, there are two cupholders under a sliding lid in the centre console and the glove box is a decent size. 

Power and connectivity options run to four USB-C ports, a 12-volt socket and the wireless device charging pad.

Then there are the rear ‘+2’ seats, and Mercedes makes no bones about the fact they’re intended for occasional use only, even suggesting a 1.5m occupant height limit.

And there’s no doubt they offer a handy emergency seat or a fun kids’ zone. Just ask a Porsche 911 Carrera owner how much this kind of seating arrangement increases a sports car’s flexibility.

At 183cm I gave the back seat a crack, which meant sliding the front (passenger) seat way forward with the backrest close to upright. But I squeezed in, and there was just enough legroom for a person in front at the same time. 

With the roof in place there’s the added pleasure of cranking your head over to around 45 degrees. But it’s do-able! 

No storage, adjustable ventilation, or power back there. But that’s fair enough, especially given there are USBs available in the front centre storage box.

Boot volume is 240 litres with the roof up and 213 litres with it folded, which is enough for some light luggage, and not too shabby when you think a Toyota Corolla hatch offers up just 217 litres (with all seats up).

There’s a 12V socket in there, but don’t bother looking for a spare, in the event of a flat your only option is a repair/inflator kit.

Okay, so how do you approach practicality in a car that’s so obviously not engaged with the concept?

Best to say there’s cursory consideration in terms of cabin storage, with a modest glovebox, small pockets in the doors, and a pair of piccolo-sized cupholders in the console. There’s also a net and some general oddments space along the bulkhead behind the seats. 

But the saving grace is a generous, rectangular boot in the nose, offering 230 litres of easy-to-access load space.

Another attribute fitting broadly under the heading of practicality is the retractable hardtop which smoothly unfolds/retracts in just 14 seconds and operates at speeds up to 40km/h.

Let’s get the big number out of the way. The Ferrari 488 Spider costs $526,888 before on-road costs.

Included in that not inconsequential figure is the ‘E-Diff3’ electronically-controlled differential, ‘F1-Trac’ traction control, ASR & CST, ABS, an anti-theft system, carbon-ceramic brakes, Magnaride shock absorbers, dual-zone climate control, racy leather seats, bi-xenon headlights with LED running lights and indicators, keyless start, Harman multimedia (including 12-speaker, 1280-watt JBL audio), 20-inch alloy rims, tyre pressure and temperature monitoring, and… a car cover.

But that’s just the starting point. Any self-respecting Ferrari owner will need to put a personal stamp on their new toy and the prancing horse is happy to oblige.

If you want an exterior colour to match your favourite polo pony’s eyes, no problem, the Ferrari Tailor-Made program will do whatever it takes. But even the standard options list (if that makes sense) offers more than enough scope to make an already spectacular four-wheel statement even more distinctive.

Our test car featured six new Mazda3’s worth of extras. That’s just under $130k, with the highlights being more than 25 grand in exterior carbon-fibre, $22k for the special, two layer, iridescent effect ‘Blue Corsa’ paint, over $10k for chrome painted forged rims, and $6790 for Apple CarPlay (standard on the Hyundai Accent).

But you’ve got to remember an inverse logic applies here. While some may see $3000 for cavallino rampante shields on the front wings as somewhat pricey, to a proud Ferrari owner they’re badges of honour. In the yacht club carpark, showing off their latest acquisition, you can script the satisfied boast - ‘That’s right. Two grand. Just for the floor mats!’

This new ‘4Matic’ all-wheel-drive SL63 features AMG’s (M177) 4.0-litre twin-turbo V8, superseding the previous rear-wheel-drive SL’s similarly configured 5.5-litre unit.

Hand built by one AMG technician from start to finish, it produces 430kW (around 580hp) from 5500-6500rpm and 800Nm across a broad plateau from 2500-5000rpm.

It’s something of a mechanical masterpiece, and the previous seven-speed auto transmission, driving the rear wheels only, has been replaced by a nine-speed dual-clutch auto (with wet multi-disc start-off clutch) sending drive to all four wheels via Merc’s ‘4Matic’ AWD system.

The 488 Spider is powered by an all-alloy, mid-mounted 3.9-litre, twin-turbo V8, featuring variable valve timing and dry sump lubrication. Claimed outputs are 492kW at 80000rpm and 760Nm at a usefully low 3000rpm. Transmission is a seven-speed 'F1' dual clutch driving the rear wheels only.

Mercedes-AMG’s official fuel economy number for the SL63 on the combined (WLTP) cycle is 13.9L/100km, the 4.0-litre twin-turbo V8 emitting 319g/km of CO2 in the process.

On the roughly 300km launch program we covered urban, B-road and some freeway running, returning an (indicated) average of 17.5L/100km. And that reflects some enthusiastic driving along the way.

The fuel tank requires 70 litres of 98 RON premium unleaded to fill it which translates to a theoretical range of around 500km, dropping to 400km using our real-world number.

I recall driving the AMG SL65 around the backroads of Tassie a few years ago and that twin-turbo V12 monster famously packed 1000Nm of torque, while this car ‘only’ has 800.

But there comes a point where enough is enough… and this is enough!

With maximum torque available from 2500-5000rpm and peak power (430kW) on call from 5500-6500rpm there’s always stupendous acceleration available with a squeeze of your right foot.

Claimed 0-100km/h time is supercar fast at 3.6 seconds, while top speed is a toupe-troubling 315 km/h. And that’s electronically limited!

A typically ferocious engine noise and howling exhaust note accompany rapid progress and shifts from the nine-speed dual-clutch transmission are quick and positive, not to mention especially enjoyable using the steering wheel-mounted paddles.

There are six ‘AMG Dynamic Select’ drive programs from Comfort through to Race, the latter including a Drift Mode, which we didn’t experiment with. Nor did we dip into the ‘AMG Track Pace’ system for circuit-focused mapping and timing

However, far from drifting, the grippy Michelin Pilot Sport 4S rubber (275/35 fr - 305/30 rr) plants the car securely with the all-wheel-drive system and electronic locking rear diff playing their part.

I found the perfect set-up was in the ‘Individual’ mode with the engine, transmission and steering in racier settings and the suspension in ‘Comfort’. The adaptive damping in this configuration mixes smooth ride compliance with sharp dynamic response.

The car’s aluminium space frame chassis is part of a body structure mixing aluminium, magnesium, fibre composites and various strength steels.

Torsional rigidity is claimed to have been improved by 18 per cent and despite the lack of a roof the SL feels tight and solid.

Suspension is by alloy double wishbones front and rear with adaptive damping and active hydraulic anti-roll stabilisation standard (so, no physical anti-roll bars).

At the same time the 4Matic AWD system is able to vary torque distribution up to 100 per cent to the front or rear axle depending on where drive can be put to best use.

The speed sensitive, variable ratio, electronically controlled steering is accurate and turns in beautifully with good road feel. No doubt assisted by electric rear steering able to adjust the angle of the rear tyres by up to 2.5 degrees.

All this adds up to a hugely impressive package that, despite its 1970kg kerb weight, feels agile, athletic and able to attack corners like an overgrown hot hatch, putting its power down with unwavering authority.   

While indecently fast the SL63 can also stop rapidly with the AMG high-performance braking system standard. 

Huge composite ventilated and cross-drilled discs (390mm fr - 360mm rr) are clamped by six-piston fixed alloy calipers at the front and single-piston units at the rear. They wash off speed calmly and consistently with perfect pedal feel.

Even at highway speeds, particularly with the windows up, normal conversation is easy with the roof down. But if you need to raise (or lower) it, the operation takes 15 seconds and is possible up to 60km/h. 

Under the heading of miscellaneous observations, the turning circle is a not insubstantial 12.8m, so beware in the car park.

A front axle lift function is a welcome standard feature, raising the car’s nose 30mm with the press of a button. And lift locations are stored in GPS data, so the car will subsequently remember to lift itself at the same place, even if you don’t! 

Heating and cooling for the front seats combined with the heated steering wheel and Air Scarf neck warming makes winter top-down driving a pleasure.

The digital instrument display is not only crystal clear, it can be changed through multiple configurations, including a tunnel-like graphic for engine revs as well as specific readouts for speed, g-force, the lot.

At the same time, the central media screen’s angle can be adjusted to better cope with reflections and the windscreen wiper system Merc calls ‘Magic Vision Control’ channels fluid along the wiper arms onto the rubbers, which isn’t new, but works spectacularly well here.  

We had the rare opportunity of driving the 488 Spider on road and track with Ferrari Australasia handing us the keys for a rural run from Sydney to Bathurst, followed by some private bonding time on the roads around town, then a batch of unrestricted hot laps on the Mount Panorama circuit in the lead up to this year’s 12 Hour race (which the scuderia won in emphatic style with the 488 GT3).

On the freeway, cruising at 110km/h with roof open, the 488 Spider is civilised and comfortable. In fact, Ferrari claims normal conversation at speeds over 200km/h isn’t a problem. Top tip (no pun intended) is to keep the side glass and small electric rear window raised to minimise turbulence. With the roof up, the 488 Spider is every bit as quiet and refined at the fixed roof GTB.

The 458 Italia atmo V8’s rising fortissimo howl is one of the world’s greatest mechanical symphonies.

Even with the multi-mode Manettino in its regular ‘Sport’ setting and the seven-speed ‘F1’ dual-clutch gearbox in auto, all it takes is a gentle crank of the right ankle to despatch pesky road users with the temerity to impede the 488’s progress.

On the quiet, open and twisting roads around the outskirts of Bathurst we may have flicked the switch to ‘Race’, slipped the gearbox into manual and given the 488 Spider a nudge. In some sweeping corners on Mount Panorama we might have even tested Einstein’s theory that matter bends the fabric of space and time. In short, we were able to get a good feel for the car’s dynamic abilities, and they are monumental.

Relative to the 458, power is up a lazy 17 per cent (492 v 418kW), and turbo-fed torque leaps a staggering 41 per cent (760 v 540Nm), while kerb weight is trimmed by 10kg (1525 v 1535kg).

The result is 0-100km/h in 3.0 seconds (-0.4sec), 0-400m in 10.5 (-0.9sec), and a maximum velocity of 325km/h (+5km/h).

If you must know, given fuel efficiency and emissions performance was the key driver behind Ferrari’s move to a turbo powerplant, all this is balanced by claimed 11.4L/100km combined economy (down from 11.8 for the 458).

A full blown launch in this car is like lighting the wick on an Atlas rocket, with a seemingly never-ending surge of thrust pinning your back to the seat, and each pull of the column-mounted carbon gear paddle delivering a seamless and near instantaneous shift. Ferrari claims the 488’seven-speed ‘box shifts up 30 per cent quicker, and down 40 per cent faster than the 458’s.

The lofty summit of the twin turbo’s torque mountain arrives at just 3000rpm, and once you’re up there it’s a table top rather than a peak, with more than 700Nm still on call at close to 7000rpm.

Maximum power arrives at 8000 (perilously close to the V8’s 8200rpm rev ceiling), and the delivery of all this brute force is impressively refined and linear. To improve throttle response, the compact turbos incorporate ball-bearing-mounted shafts (rather than the more common sleeve bearing type), while the compressor wheels are made from TiAl, a low-density titanium-aluminium alloy. As a result, turbo lag simply isn’t in the 488’s vocabulary.

And what about the sound? On its way to 9000rpm the 458 Italia atmo V8’s rising fortissimo howl is one of the world’s greatest mechanical symphonies.

Maranello’s exhaust engineers allegedly spent years fine-tuning the 488’s aural output, developing equal length tubes in the manifold to optimise harmonics before gas flow reaches the turbos, to get as close as possible to the high-pitch wail of a naturally aspirated Ferrari V8. 

All we can say is the 488’s sound is amazing, immediately turning heads on contact... but it ain’t no 458.

Using the 488 Spider’s incredible dynamic ability to translate forward momentum into lateral g’s is one of life great pleasures.

Supporting the double wishbone front and multi-link rear suspension set-up is a host of high-tech widgets including the tricky E-Diff3, F1-Trac (stability control), High-Performance ABS with Ferrari Pre-Fill, FrS SCM-E (magnetorheological shock absorbers), and SSC (side-slip control).

Combine that with the active aero quietly turning the car into a four-wheel suction cup, plus ultra-high performance Pirelli P Zero rubber, and you have amazing grip (the front end especially, is incredible), perfect balance and stunning corner speed.

Our Mount Panorama blat confirmed the 488 Spider remains poised and throttle steerable through corners and curves at ludicrous speeds.

Chasing gears into the top of the ‘box up mountain straight made the lights on the upper rim of the steering wheel look like a fireworks display. The Spider transmitted its every move across the top of the circuit through the lightweight seat, and the very fast blast into The Chase at the bottom of Conrod Straight was other-worldly. Set the car up on entry, keep squeezing the throttle, grease in just a fraction of steering lock, and it just blazes through like a high-speed hovercraft, at 250km/h-plus.

More time back outside Bathurst confirms feel from the electro-hydraulic rack and pinion steering is brilliant in the real world, although we did notice the column and wheel shaking in our hands over bumpy backroads.

The quick fix there is a flick of the ‘bumpy road’ button on the steering wheel. First seen on the 430 Scuderia (after then Ferrari F1 hero Michael Schumacher pushed for its development), the system de-links the shock absorbers from the Manettino setting, providing extra suspension compliance without sacrificing engine and transmission response. Brilliant.

Stopping power comes courtesy of a ‘Brembo Extreme Design’ system derived from the LaFerrari hypercar, which means standard carbon-ceramic rotors (398mm front, 360mm rear) clamped by massive calipers - six piston front, four piston rear (our car’s were black, for $2700, thank you). After multiple stops from warp speed to walking pace on the circuit they remained firm, progressive, and hugely effective.

In terms of active safety the various driver aids mentioned above do their part to avoid a crash, and if the worst comes to worst dual front and side airbags are in place.

The 488 Spider has not been rated for safety performance by ANCAP.

The SL63 4Matic+ will be covered by Mercedes-AMG’s five-year/unlimited km warranty, with roadside and accident assistance included for the duration, both of which are expected in this category. 

Maintenance intervals are 12 months/20,000km, and a fixed-price service plan lists an average of $1583 for each of the first three visits to the workshop. Not exactly small change, but not unheard of in this part of the market.

The Ferrari 488 Spider is covered by a three year/unlimited km warranty, and purchase of any new Ferrari via the authorized Australian dealer network includes complimentary scheduled maintenance, through the ‘Ferrari Genuine Maintenance’ program for the first seven years of the vehicle’s life.

Recommended maintenance intervals are 20,000km or 12 months (the latter with no km restrictions).

Genuine Maintenance attaches to the individual vehicle, and extends to any subsequent owner within the seven years. It covers labour, original parts, engine oil and brake fluid.