Audi S4 vs Subaru Crosstrek

What's the difference?

The S4 and S5 range continues to represent a great formula for performance you can live with every day. They're arguably the sweetest balance Audi produces, actually. All come fantastically equipped, with cabins that feel truly special, and we’re lucky they can be had in a choice of five bodystyles.  

It’s not perfect, in fact, the Crosstrek has a few factors that would probably turn off groups of buyers at a time, but Subaru knows its audience isn’t ‘everyone’.

Subaru customers aren’t trying to get their fuel efficiency below 4.5L/100km, nor find the car with the most luxurious interior. They’re looking for a practical Jack or Jill of all trades, which the Crosstrek does rather well for its segment.

Few small SUVs are as agreeable on rough and unsealed roads without sacrificing suburban comfort, while its features list is practical and provides plenty for the money.

Unfortunately, the hybrid system is a little underwhelming, and if it’s the main draw of the Crosstrek for you, it could be worth considering the less expensive ($38,590) Hybrid L or even a hybrid rival like the Toyota Corolla Cross or Mitsubishi Eclipse Cross.

If the all-round ability of the Crosstrek is the draw, however, the non-hybrid L is still an excellent offering and doesn’t use a lot more fuel than the Hybrid - plus it’s several grand cheaper at $41,490.

The Crosstrek is great for active people who need a bit of flexibility in one car but for the vast majority, the hybrid probably isn’t the sweet spot in the range. However, that won’t hinder the Crosstrek as an overall model, its popularity is already proven, and the option of a Hybrid puts Subaru a little closer to the eventual necessity of electrification.

The S4 sedan and Avant have scored the bulk of design updates, with all new and recontoured side panels including the sedan’s C-pillar matching what was applied to the A4 earlier this year. 

This is paired with new front and rear facias and lighting for a subtle but extensive rework of the fifth-generation S4’s conservative look. 

The S5 Sportback, Coupe and Cabriolet get S5-specific new lighting and facias, but no sheetmetal changes. As before, the Coupe and Cabriolet ride on a 60mm shorter wheelbase than the Sportback, sedan and Avant.

The S5s also get Matrix LED headlights as standard which do a neat animated sequence when you unlock the car. 

Other visual hallmarks include new S4-specific 19-inch wheels, with S5 stepping up to its own unique 20-inch wheel. The six-piston front brake calipers are appropriately painted red, and there’s S-specific adaptive dampers under there too. All variants aside from the Cabriolet get a lip spoiler on the rear.

On the inside, there’s a new centre console and bigger 10.1-inch multimedia screen, while the Audi Virtual Cockpit driver instrument display now offers a hockey stick-style rev counter in additional to traditional dial layouts.

Perhaps unsurprisingly, the new Crosstrek looks an awful lot like its a development of the Subaru XV.

Which, given the latter’s popularity, is a very good thing.

While there are a lot of similarities, especially when it comes to some of the more rugged elements, the Crosstrek still manages to look quite new.

It’s rugged without having too many ‘busy’ design elements and it even looks at home in inner-city suburbs. 

Of course, its raised body and cladding are mostly for practical reasons, but it gives the small SUV an adventurous aesthetic that separates it from city-focused rivals.

As essentially a high-riding development of the Impreza hatch, its size and proportions also make it look more like a ‘big car’ than a small SUV.

The biggest practicality change among the five S4 and S5 variants is their upgrade to the latest version of Audi’s MMI multimedia system, which steps up to a 10.1-inch touchscreen and drops the scroll wheel from the centre console.

It also boasts ten times the computing power of the version it replaces and uses this and an on-board sim card to access Google Earth maps for navigation and Audi Connect Plus that offers driver information such as fuel prices and parking information as well as point of interest search and weather information, plus the ability to make emergency calls and seek roadside assistance.

There’s also a wireless phone charger, but using Apple CarPlay will still require a cord as per Android Auto.

I only drove the S4 Avant and S5 Sportback at their media launch, which are clearly the most practical of the five, but from our experience with the previous versions, each looks after its occupants well in terms of space and storage. Back seat accommodation is clearly not a priority in the Coupe and Cabriolet, but there’s three other variants if that’s what you’re looking for. 

The Cabriolet can open its automatic folding soft top within 15 seconds, at speeds of up to 50 km/h.

Practicality is pretty much a staple of Subaru as a brand, so it should be a huge surprise that it feels that way from the driver’s seat.

The interior doesn’t look futuristic, but it does look functional. 

For example, even though the centre of the dash is all screen - and we love buttons for climate controls around here - the controls for air conditioning and temperature are at least always present on the screen, no sub-menus needed.

The phone charger is large enough for even very tall phones (looking at you, Samsung Galaxy S20 Ultra, pictured), and it’s out of the way to minimise extra digital distraction.

The steering wheel’s buttons, while many, are all clear and simple, as is the iPad-like icon layout on the multimedia screen.

Storage in the front is miles ahead of the rear seats, a large central bin with two cupholders, a big glove box, and decent space for water bottles in the door cards. In the rear, two central cupholders in the armrest and a small space in the door.

But there is a decent amount of space for an adult to sit in the rear, even if the sides of the roof are a little close to the head. It’s a little like the front, where the seats are supportive and easy to adjust to a comfortable position.

Further back, the boot space is a relatively small 315 litres, though its slightly larger than the 291L the petrol versions come with - that extra space likely swallowed by a spare tyre in the petrol versions, as opposed to the smaller batteries taking up some space in the hybrids.

When you’re wearing a hybrid badge and you’re up against veterans in the field like Toyota with the Corolla Cross, you want to make sure you’re offering up something substantial.

At $45,090, before on-road costs, the Hybrid S tops the range and comes with a features list that screams it from the rooftops. Or the mountaintops. Or at least as far as the gravel tracks will take you towards the mountaintop.

From the outside, 18-inch wheels are the first indicator for the ‘S’ grade - note that hybrids don’t come with spare wheels, just repair kits - as well as body coloured door handles and black plastic trim and cladding, aside from the gloss mirror caps.

The door mirrors are heated and fold away when parked, while up top there’s a sunroof flanked by roof rails, with a styled spoiler at the rear.

Interestingly, there’s no power tailgate.

LED DRLs and headlights are automatic and are aided by steering responsive active cornering lamps, while the wipers are auto rain-sensing.

Inside, dual-zone climate control and heated front seats (the driver’s is eight-way power adjustable) for the cold - all seats are leather accented - while the steering wheel and shifter are also leather-wrapped.

Tech is covered off by the usual 11.6-inch portrait touchscreen centrepiece, with sat-nav, AM/FM and digital radio, wireless Android Auto and Apple CarPlay, USB-A and USB-C plugs (in the rear, too), a wireless phone charger, and a 10-speaker Harman Kardon sound system over the usual six-speaker set-up. There’s even an auxiliary audio input.

The driver display is a small 4.2-inch unit flanked by physical dials.

Audi has taken an ‘if it ain’t broke’ approach with the mechanicals, with all S4 and S5 models unchanged with this update. So the centrepiece continues to be the single-turbocharged 3.0-litre V6 that produces 260kW and 500Nm, with the latter available from a broad 1370-4500rpm.

The rest of the drivetrain is also unchanged, with the venerable but excellent ZF eight-speed torque converter auto paired with the Quattro all-wheel drive system that can send up to 85 per cent of drive to the rear wheels. 

This is perhaps the part of the review you’re most interested in - as well as the following sections on efficiency and maybe driving - if the ‘Hybrid’ part of the Crosstrek Hybrid S’ name brought you here.

Like its design and interior, the engine will be familiar to anyone who has owned or driven a relatively recent Subaru - a 2.0-litre flat-four petrol engine good for 110kW/196Nm - which means it makes a little less than the standard petrol variant’s 115kW.

However, the electric motor is capable of its own 12kW/66Nm outputs, though Subaru doesn’t supply a claimed total maximum for the whole powertrain.

Drive is transferred to all four wheels - it is a Subaru after all - via a seven-step continuously variable transmission (CVT).

Official combined fuel figures range from 8.6L1/00km for the S4 sedan to 8.8L/100km for the Avant, Coupe and Sportback, while the heavier Cabriolet steps up to 9.1L/100km. 

All are pretty good considering their performance potential and the size of these cars, plus the fact that they only require 95 RON Premium Unleaded fuel.

All have a 58-litre fuel tank, which should enable a range of at least 637km between fills based on the Cabriolet’s figure.

Subaru claims the Crosstrek Hybrid will sip 6.5L/100km on the combined cycle, which isn’t enough to blow anyone away, even when you take into account the extra fuel needed for permanent all-wheel drive. The AWD Corolla Cross Hybrid comes with a claimed 4.4L/100km.

Compare this to the 8.5L/100km reading the Crosstrek returned after our time with the car, mostly with a (somewhat unkind) mix of inner-city and semi-rural backroad driving, and it’s clear the Crosstrek isn’t one of the most frugal cars in its class.

More highway driving would certainly have lowered the figure - we’ve achieved 8.0-litres on previous testing with a non-hybrid Crosstrek - but perhaps being top of the charts for efficiency isn’t necessarily what Subaru buyers are looking for.

Of course, the Crosstrek Hybrid S employs a couple of features to avoid using fuel where it can be avoided, such as auto stop-start and its (relatively mild) electric system taking over when mostly coasting or the engine isn’t required.

The S4 and S5 range were already an excellent balance between everyday comfort and a genuine sporting edge, and nothing has changed with this update.

I spent time behind the wheel of the S4 Avant and S5 Sportback at their media launch, and both managed to deliver the proper Audi luxury experience over some pretty rough rural roads, while always feeling a bit more sporting than a regular A4 or A5. That’s with the Drive Select left in the default mode, but you can shift that sporting personality up a few notches (while scaling back the comfort), by selecting Dynamic mode. 

My preferred means of adjusting their personality is by simply tugging the transmission selector back to activate S mode, which livens up the engine and transmission without stiffening up the suspension. 

Across the five S4 and S5 bodystyles, there is some variance in performance potential, with the S4 sedan and S5 Coupe topping the performance chart with 0-100km/h boasts of 4.7s, with the S5 Sportback trailing them by 0.1s, the S4 Avant by a further 0.1s and the Cabriolet managing a still-fast 5.1s claim.

Another area I consider the S4 and S5s to get just right is their exhaust note. It is adaptive, but there’s nothing synthetic about it, and the generally muted and distinctly V6 burble is always there to remind you that you’re aboard a proper performance model, but not in such a way that it will annoy you, or your neighbours. Polite performance, if you will.

Two things stand out after a short stint behind the wheel of the Crosstrek Hybrid, and both become more cemented over time.

The first is that the ‘Hybrid’ part of the ‘Crosstrek Hybrid S’ isn’t quite as prominent in its real-world impact as it is in its name.

The 110kW engine doesn’t feel like it’s being massively helped along by any electric assistance, and the electric motor is very rarely doing the work by itself, as you’d find in any hybrid from Toyota or Honda.

That’s a shame, because the Crosstrek could do with a little extra oomph, if not for getting up to speed then for avoiding thrashy engine sounds under acceleration.

The CVT, while not necessarily detrimental to its performance, doesn’t help with that.

But balancing that out is a chassis and platform that’s engaging and predictable - and that’s predictable as a good thing - making the Crosstrek pleasant to pilot.

Its controls like steering and braking are nicely weighted for low speeds, commuting, and for more spirited driving, while the suspension and chassis handles surfaces from smooth suburban roads, to city tram tracks, to unsealed roads with ease, soaking up bumps and shakes nicely.

If you’re noticing a theme in this review, it’s that Subaru doesn’t seem to be chasing any ‘best at’ metrics in favour of giving the Crosstrek the ability to do a range of different driving and being at least satisfactory in any given area.

As the range-topper, the Subaru Hybrid S comes with the lot in terms of safety. 

And even though it hasn’t been tested by ANCAP yet, it’d be a shock if its score was anything less than the maximum five stars.

It’s what the XV scored in 2017, and the brand hasn’t missed out on full marks since the Impreza and Foresters of the early 2000s.

Nine airbags include dual front, dual front side, dual curtain, driver's knee, far side, and front passenger seat cushion airbags, plus Subaru’s 'EyeSight' safety suite does the work in crash prevention.

On top of the standard safety features you’d expect from any new car like electronic stability control and ABS, there’s a ‘Pedestrian alert system’, emergency lane keep assist with departure warning and prevention, a ‘Driver Monitoring System’ that includes drowsiness and distraction warnings, sensors and monitors for blind spots and rear cross-traffic, and of course parking sensors.

Some less common features of EyeSight include ‘Lead Vehicle Start Alert’, ‘Pre-Collision Braking System’, ‘Pre-Collision Throttle Management’, ‘Intelligent Speed Limiter’ as well as ‘Speed Sign Recognition’ and ‘Brake Light Recognition’.

Specific to the S, is a surround-view parking camera, high beam assist, plus front- and side-view monitors to help avoid kerbing wheels or bumping towbars.

It’s all fairly well implemented in the Crosstrek, though some of its chimes can be a bit much - the driver distraction alert can mistake a quick climate control change at the lights for a proper lapse of focus, while an alert for approaching speed and red light cameras comes without any indication of what the noise is for.

Audi continues to offer a three year, unlimited kilometre warranty, which is in line with BMW but lags behind the five years offered by Mercedes-Benz these days. This also contrasts with the five year norm among mainstream brands, which is punctuated by the seven year warranties of Kia and SsangYong.  

Service intervals are a convenient 12 months/15,000km though, and the same five year ‘Audi Genuine Care Service Plan’ offers capped price servicing for the same $2950 total over five years applies to all S4 and S5 variants. This is only marginally more than the plans offered for regular petrol A4 and A5 variants, so you’re not being stung for the thoroughbred versions.

The Crosstrek is covered by Subaru’s five-year/unlimited kilometre warranty, with servicing intervals coming up every 12 months or 15,000km under Subaru’s five-year capped-price servicing.

Subaru also adds 12 months of free roadside assistance.

This is all fairly standard in the industry, though some brands like Kia and MG offer seven-year warranties, or there’s Mitsubishi with a 10-year warranty (even if it requires certain conditions to be met during the decade).