Subaru Crosstrek vs BMW Alpina B4

What's the difference?

The Crosstrek is good to drive with great ground clearance and an excellent all-wheel drive system for light off-road adventures. I’m also a fan of the styling and features for the money. But The letdowns comes in the form of limited boot space and cabin storage, a short warranty and pricey servicing. Still, it’s great to see Subaru has updated the car's safety systems, the most important part of any car.

You could almost call the B4 S the anti-M4. It's still fast and practical but from a completely different perspective. It's much more a grand tourer than the M4 and even with the Akrapovic exhaust (usually a byword for joyous, anti-social racket), subtle.

For some, the price won't matter because the Alpina delivers what they want - M4-like straight line performance without the histrionics or the uncompromising chassis. And there's also a bit of that perverse exclusivity of the styling that you won't get anywhere else.

While SUVs tend to come in either a tall and boxy or coupe-like shape, the Crosstrek has a uniquely sleek and sporty wagon look that has stayed much the same over three generations.

Also while the Crosstrek competes with the Honda HR-V, Hyundai Kona, Mazda CX-30 and Toyota Corolla Cross the Subaru is the most off-road suitable thanks in part to its high 220mm ground clearance

As if to signal those adventurous aspirations the Crosstrek has a more rugged appearance with robust-looking plastic guards and chunky roof rails.

Inside the Crosstrek looks so much the same as most other new Subarus it's hard to work out which one you’re in. The materials are dark and soft, there is not much in the way of glitzy trimmings but there’s a high quality feeling throughout. 

Alpina has always had a particular aesthetic that could uncharitably be termed as mid-'80s West German - all set square angles and body graphics. Think David Hasselhoff's Berlin Wall look. The company has never really deviated from adding squared-off body bits to the various BMWs it has rebadged under its long-running agreement.

For the B4S, Alpina adds the signature billion-spoke alloy wheels (only a slight exaggeration), a new front splitter complete with Alpina lettering, a weirdly proportioned boot lid lip spoiler and - not even joking - pinstripes. Like I said, mid-'80s West German. You can still recognise the sleek 4 Series Coupe but perhaps the worst of it is the super-sized, wonky-looking ALPINA B4S on the boot.

Inside is rather more restrained apart from the ill-fitting Alpina plaque under the climate control. Again, it's all 4 Series in here, with the lovely Merino leather liberally applied across the cabin. Less lovely is the wood on the door pulls and console but the door cards have an oddly appealing woven leather which looks and feels good.

Sadly the standard 4 Series steering wheel is along for the ride. There's nothing wrong with it - although the Alpina logo does look out of place - but if I were a product planner, I'd beg for the lovelier M wheel.

The Crosstrek is a small SUV but its low and sleek shape doesn’t do it any practicality favours in terms of exiting and entering or storage in the boot.

Boot capacity is 291 litres which is very small compared to its rivals which have capacities closer to 350 or 400 litres.

People space inside, however, is good, and even for a tall (189cm) person like me there’s plenty of space up front and behind my driving position.

Storage space is passable with three cupholders and thin door pockets and a decent-size console bin.

Given the Crosstrek’s adventurous intent, the cabin should be more reflective of that rugged aspiration.

If you're in the front, you're in luck - it's a comfortable place to be, with plenty of leg and headroom. Down back isn't terrible despite the coupe roofline. The two seats are nicely shaped for maximum comfort and separated by an odd plastic tray. The fold-down armrest has two cupholders.

Front seat passengers score a pair of cupholders (bring the total to four for the car) and the long doors will hold a bottle each.

The boot swallows a reasonable 445 litres, which isn't at all bad.

If you thought BMW don't mess about when pricing up its cars, you best strap yourself in. The 440i-based B4S starts at a solid $149,900. That's $48,000 more than the 440i and significantly more than an M4 Pure. But there's plenty of gear on offer and some genuine, bespoke Alpina additions.

Standard are 20-inch signature Alpina alloys, 16-speaker harmon kardon-branded stereo with DAB, super-soft Merino leather everywhere, dual-zone climate control, around-view cameras, reversing camera, sat nav, keyless entry and start, front and rear parking sensors, active cruise control, heated and electric front seats, head-up display, auto headlights and active LED headlights, LED taillights and electric sunroof.

The stereo and sat nav are run by BMW's iDrive. It's a cracker of a system and almost gets away without Apple CarPlay and Android Auto. The absence of such simple pleasures at this price point is a bit lame, but here we are.

The Crosstrek 2.0S uses a 2.0-litre, four-cylinder, horizontally-opposed 'boxer' petrol engine which makes 115kW and 196Nm. A continuously variable transmission (CVT) with eight 'speeds’ isn’t the most exhilarating automatic but all Subaru now use CVTs.

The boxer engine has advantageous in terms of a lower centre of mass and helps deliver better driving feel thanks to more adept handling. Boxer engines also sound better to my ears with their throaty burble.

A lot of your extra money turns up under the bonnet. These days the 440i packs BMW's slick B58 turbo straight six and the B4S does likewise. The boys from Buchloe in Bavaria (there are certain to be women there, too, I just liked the alliteration) added a pair of Alpina-spec turbos to generate a whopping 324kW and, more importantly, 660Nm. Alpina says 600Nm (the max torque figure of the brilliant M4 CS) is available from 2000-5000rpm, while the full 660Nm is available from 3000 to 4500rpm.

The M4 Pure has 317kW and 550Nm from the S55 straight-six. Just so you know.

Like the 440i but unlike the M4, the B4S employs the dependably brilliant eight-speed ZF automatic found throughout the BMW range.

The Crosstrek 2.0S's combined cycle (urban/extra-urban) fuel consumption is 7.2L/100km which aligns closely with our real-world test average of 8.7L/100km returned over mainly urban and city driving. That’s not bad, but given the price of fuel as well as the availability of EVs and excellent hybrids from other brands the Crosstrek is seriously behind the times.

Yes, yes, there is a hybrid Crosstrek, but it’s a mild-hybrid and the electric motor doesn't drive the wheels and doesn’t save much fuel. The hybrid Crosstrek has a claimed combined cycle consumption figure of 6.5L/100km, so there’s not much difference between the efficiency of the two. When you consider the price premium you need to pay it’s not worth stepping up into the hybrid.

Alpina quotes 7.9L/100km on the combined cycle and we went through the premium unleaded at the rate of 11.7L/100km. I enjoyed myself, so that's not a terrible result.

I’ve never met a new Subaru that wasn’t good to drive, apart from that time a friend sent me his 30-year old Brumby minus brakes. But even that was fun, until it was time to stop… Anyway, in my view the Crosstrek is better than its rivals in multiple areas except one, which I’ll get to in a moment.

The Crosstrek 2.0S is comfortable to sit in and its ride and handling balance is exceptional for a vehicle in this class. Honestly, the ride quality, body control and steering outshines the HR-V, Kona, CX-30 and Corolla Cross in my view.

A big call out has to go to the Crosstrek's all-wheel drive system, which is exceptional. I have tested this vehicle in some pretty adventurous settings and the kind of terrain it can devour would frighten its rivals.  

But the one area that lets the experience down is the CVT auto. I feel this way about this type of transmission in any car and I’m not alone. CVTs provide smooth acceleration and deceleration but if you’re hoping for an engaging, sporty experience you’ll be left wanting.

That said, my wife also drove the car and thought it was perfect for city traffic. And I agree, it’s just on the motorway where you might notice the lack of oomph when overtaking.

Visibility is good and you sit quite high for a little SUV. That small size makes it easy to park and manage in the city’s tighter spaces.

One of the key differences between the B4 and M4 is the ride. While the M4 can crash over bumps and generally be a little hard to live with, the crew in Buchloe have gone after a much more plush ride. And in that they have succeeded because the B4 S is a mighty fine cruiser. Bumps are dismissed with a haughty disdain, even Sport + silliness doesn't completely write-off ride quality.

Very impressive too, is the steering. While still not at Lotus Elise levels of feel (few cars are), the Alpina tweaks connect the your palms to the road with more clarity than what you'll find in the 440i or M4. Where the M4 particularly adds too much weight, the 440i is a bit more circumspect in that regard.

And then we come to the engine. The B58 six is a belter, better even than the N55 that preceded it. It's still a 3.0-litre straight six but is part of BMW's modular engine family that starts with a 1.5-litre triple in the Mini and 1 Series. The Alpina-spec turbos are noisier, the Akrapovic exhaust lighter and also noisier. It doesn't have the all-out crackle and pop of an Audi or Merc (perish the thought), but when you're on it, the B4 means business. The 660Nm of torque, available over a wide rev range, delivers a steel fist wrapped in a velvet glove and bubble wrap - the speed builds rapidly but smoothly. 

The approach to the chassis tune seems to be based on the driving talents of mere mortals on normal roads, which is kind of like the 440i. It's terrific fun to drive hard but it's very forgiving and patient. The great thing about it is that you wouldn't think twice about jumping in it for the long haul, so comfortable and quiet is the cabin. The M4 will leave it for dead on a winding road, but that's perfectly fine.

One irritant is the replacement of the admittedly cheap BMW gearshift paddles with weirdly non-tactile buttons. They're not particularly easy to use and, probably worse for a sporty car, unsatisfying. It's an odd detail with which to go off the reservation. Cheeringly, the eight-speed ZF is its usual perfect self, so you don't have to worry too much about manual mode or go old school and use the shifter.

The Alpina ships with six airbags, ABS, stability and traction controls, ABS, stability and traction controls, forward collision warning, forward AEB, road sign recognition and active cruise control.

There are also two ISOFIX points in the rear. Neither the Alpina nor the 4 Series has an ANCAP safety rating.

Subaru’s five year united kilometre warranty is becoming less appealing as other brands offer seven or even 10 years of coverage. 

Servicing is recommended every 12 months/15,000km and a capped schedule is pricey relative to its competitors at more than $2400 over five years or about $400 on average per service.

The brand is represented by a long-established and stable network of close to 130 dealers covering metro, rural and regional locations across every state and territory.

Alpina offers a two-year/unlimited-kilometre warranty which is a bit behind the times and not in keeping with the price point. Servicing is another matter altogether and you're subject to your dealer's standard charges for servicing.