BMW Alpina B5 vs BMW M2

What's the difference?

The Alpina B5 is a special car – more special than most people will ever give you credit for if you own one. Those that do know what an Alpina is will let you know; people will cross dangerously busy streets to talk to you about your car. Insanely fast, almost incomprehensibly comfortable and effortlessly powerful to drive.

Proving good things still come in small packages, the pint-sized M2 remains my pick of the BMW M range. It's not the perfect daily drive, but I reckon the fun outweighs the foibles.

Interesting is the right word for it, because while it might be questionable that Alpina's changes to the exterior are aesthetic pleasing, they are definitely intriguing to those who aren't familiar with the brand.

First, there are those 20-spoke wheels. Alpinas have worn this style of wheel forever and they've become the most famous outward sign that this is not just another BMW. So don't under any circumstances take them off and replace them with anything else. You'd be run out of town by the Alpina mafia.

Yes, they're more painful to clean than a cheese grater (trust me, I know. And if you look closely at these images you can see the dirty bits I've missed), but if you really don't like them then perhaps it's a sign this car isn't for you.

Then there's the boot-lid spoiler. It's square and 1980s'-looking, it also appears a bit like it's been bought online and installed by a teenager, but again, this is another Alpina tradition and it suits the car's character perfectly.

All right, those pinstripes; they're known as the Deco-Set and are a hat-tip to the Alpina racecars of the 1970s and '80s. Again, don't take these off, your Alpina will drop through the centre of the Earth in value. These are also part-and-parcel of owning one of these cars. I'm not a massive fan of them.

But I'm all about that front spoiler, with the floating Alpina lettering that you can option in silver, high-gloss black or gold.

Inside, there are fewer Alpina additions, but they're nonetheless unmissable. There's the Alpina-badged steering wheel, and a new virtual instrument cluster, embossed headrests and  illuminated door sills.

There's also the little numbered plaque on the centre console which proves its authenticity, ours was number 49. Out of how many? I don't know. But I do know Alpina produces only about 1700 cars globally a year. Rolls Royce does about 4000. So, you can rest assured your B5 is exclusive.

At almost 5m long, 1.9m wide and 1.5m tall, the B5 is a large saloon, but having recently reviewed the Alpina B7 it feels small in comparison. How does it drive? We're getting there.

There have been mixed reviews of the design of the BMW M range, but I reckon this one looks pretty damn good. In fact, I've always thought this kind of hyper-aggressive styling looks better on smaller cars than it does on big ones.

And it certainly is aggressive, right? From the huge bonnet bulges to the meshed out grille and angry rear diffuser, to the staggered alloys and flared wheel arches, to the blocky rear end with its four massive exhaust exits.

But my favourite exterior item has to be the blacked-out carbon roof, which helps shrink the M2 visually, and makes the whole car look more potent.

Inside, it's plenty sporty feeling, with hard-backed sports seats, lashings of carbon-fibre-look trimmings and the bright red M buttons on the steering wheel.

It's nice, but some of the touch points – like the hard plastics on top of the doors, where, if you're like me, you rest your elbow when driving – feel less than premium.

Still, all the tech is present and accounted for, with its digital dash and huge centre screen, and there's no shortage of spaces to connect or charge your phone.

Practicality is not really a BMW strong point no matter which model you pick. See, BMW mostly makes the car equivalent of uber-stylish and skin-tight active wear which looks good and performs brilliantly, but sometimes you just want pockets and a bit of room for your… um… bits and pieces.

So while there are two cup holders up front and two in the back, the bottle holders in the doors aren't huge, the centre console bin is on the small side, there's a hidy-hole in front of the shifter, the glove box is just a box for little more than gloves and there's no other great cabin storage options.

Legroom in the rear is good but not great, too - I'm 191cm tall and have about 30mm between my knees and the seat back in my driving position. Middle-seat passengers will also have to straddle the drive shaft hump in the floor. Headroom is restricted in the back, too (you could blame the sunroof) with my hair just skimming the headlining (I do have big hair).

Under that power tailgate, the B5's boot capacity is 530 litres which is 15L more than its big sister, the B7. There are two plastic storage areas either side of the luggage space for wet things. While there is one USB outlet in the front there aren't any in the rear.

The M2 pocket rocket measures just over 4.5m in length, just under 1.9m in width, and just over 1.4m in height, and it rides on a 2747mm wheelbase. That makes it longer, wider and lower than the model it replaces.

Remember that 'lower' bit, as it will come up again in a moment.

Up front, you don't feel cramped, and there's the requisite cupholders, door pockets and hiding holes, as well as wireless device charging and USB connections.

But remember, this is a two-door, four-seat affair, which cuts into the practicality a little, or a lot.

Swing open the wide front doors, and push the front seat-back forwards, and the entire chair will slide forward automatically.

It does help create more room to climb into the back, but it's still a slightly embarrassing challenge to make getting back there look anything like graceful.

Once there, it's tight. I'm 175cm and my head was firmly pressed into the roof.

You do get your own vents and temp controls, but that's about it. Even the pull-down divider only gives you access to the 390-litre boot, rather than extra cupholders.

You do get two sets of ISOFIX attachment points, though, and let's be honest –  if you're buying this to make Bunnings runs, you've probably got it wrong.

First, the bad news. The M2 has only been getting more and more expensive over the years, and this new-generation model continues that charge.

Fun fact: When we first tested this model way back in 2016, you could get the Pure grade for less than $90K with a manual transmission.

Or you could spend just under $100K for the full-fruit version. This one, though, lists at $121,700, before on-road costs.

So, a little less bang for buck, but there's still a whole lot of bang on offer here.

You'll find staggered 19- and 20-inch lightweight alloys, while standard performance kit includes an 'Active M Differential', 'Adaptive M Suspension', 'M Compound Brakes' (with blue calipers), 'M Sport Seats' up front and, for the first time, a lightweight 'M Carbon' roof.

Elsewhere, there's adaptive LED headlights, a 12.3-inch instrument display and a 14.9-inch multimedia screen, a head-up display, a Harman Kardon 'Surround Sound' audio system and Android Auto and Apple CarPlay connectivity.

You'll sit on leather seats that adjust electrically and are heated up front. There's three-zone climate control, along with a heated steering wheel, wireless device charging and ambient interior lighting.

The Alpina B5 uses the same 4.4-litre V8 engine found in the BMW M5 (and also the B7). But, and it's a big but, the M5 makes 441kW and 750Nm, while the B5 outdoes it with 447kW and 800Nm. Admittedly, the B5's torque arrives at the 3000rpm mark, while the M5's is all there from 1800rpm.

How does the B5 beat it? Alpina installed its specially developed twin turbochargers and intercoolers, a high-performance cooling system, a reconfigured air intake set up and a different exhaust system.

The B5, though, is a tenth of a second slower to 100km/h compared to the M5 with a time of 3.5 seconds, but it will blast on to a top speed of 330km/h while the M5 is limited to 250km/h in regular form and 305km/h with the optional M Driver's package.

Both uses the same ZF eight-speed automatic transmission with identical gear ratios, and both are all-wheel drive.

Besides, this is what we're really here for, isn't it? The M2 gets the 'M TwinPower' 3.0-litre twin-turbo inline-six engine, producing a sizeable 338kW and 550Nm, sending that power to the rear wheels via an eight-speed auto or six-speed manual.

BMW says this engine is very, very close to the engine that powers the M3 and M4, and says it will rocket the M2 from 0-100km/h in 4.1 seconds, and to 200km/h in either 13.5 seconds in the automatic, or 14.3 seconds in the manual.

The Alpina B5 needs petrol. By that, I mean it needs quite a lot of it if you want to enjoy it properly. What type of mileage does it get? Officially, it should use 11.1L/100km after a combination of urban and open roads, where as the M5 is set to 10.5L/100km.

That makes sense, the B5 produces more power and torque, and it's 85kg heavier than the M5 at 2015kg.

Our test car's trip computer was reporting 13.2L/100km after flying low over country roads and slow city piloting. The more time spent in the urban warfare that is the daily peak hour commute, the more that figure crept and hovered around the 15L/100km mark.

A small fly in the ointment is fuel use, with the M2 said to use 9.7L/100km on the combined cycle. It also drinks 98 RON premium, and is home to a 52-litre fuel tank. Your theoretical driving range is around 540km.

Now, be warned, you'll be bored stiff if you drive it in the way that's required to get it that low. When we were being gentle, we were somewhere between 10.5 and 11.5 litres per hundred kilometres.

Emissions are pegged a 220g/km of C02.

Ok, stay with me here. For this next bit you'll need a fresh egg, a lounge chair, and it might be a good idea to have some plastic bags and carpet cleaner on hand.

First, in front of the lounge chair flatten out the plastic bag and place the egg on it. Next, sit down on the chair and very carefully rest the ball of your foot on the egg with as little pressure as humanly possible.

This is exactly how little force you need to apply to the go-pedal of the B5 to accelerate from a standstill to 60km/h in about five seconds.

If anything sums up the driving experience of the B5, it's that sense of effortlessness.

Stomp on that accelerator, and you'll be shot to 100km/h in 3.5 seconds, without a hint of broken traction thanks to the all-wheel-drive system.

The ride should have been terrible on 20-inch wheels shod in low-profile rubber (Pirelli P Zero 255/35 front, and 295/30 rear), but the Alpina-tuned air suspension is close to miraculous in the way it cushioned and censored the potholes out of Sydney's worst roads. Yes, it can be a touch floaty, particularly in the Comfort Plus setting, but this is benchmark-setting stuff for a comfortable ride.

Don't expect this beast to roar. Unlike the M5, the B5 gets its work done without deafening everybody around it. Sure, the B5's V8 sounds amazing when you push it, but it's not brash, not loud and not lairy. Buy an M5 or Mercedes-AMG E63s if you want to be heard half a block before you get home, but you won't get that with the B5 and its exhaust system.

The B5 also handles well, but I have to say the engagement factor is low. I piloted it effortlessly through the twists and turns of my country test circuit and roads which normally have me grinning like a maniac behind the wheel had me feeling a bit disconnected in the B5. That air suspension, the numb steering and pedal actions make it difficult to ‘feel' the road.

It's highways where the B5 is a king, but even at 110km/h there's the sense that this car is still fast asleep and won't get out of bed for anything less than 150km/h - making it perfect for Germany's autobahns, but maybe not for here in Australia.

Let's be totally up front here: the BMW M2 isn't the most comfortable vehicle to live with. In fact, I recently climbed out of the M3 Touring, and found that to be more comfortable on broken city streets.

The M2 is fitted with adaptive suspension, but even in its most comfortable settings it can feel rough, bumpy and jarring on bad roads (of which Australia has lots), and unless you're gentle with the accelerator, it can feel a little jumpy when first taking off – a by-product of its prodigious power.

Now, let's be totally up front again: I don't care. The M2 is fun, plain and simple, and for mine, the above is a fair price to pay for something that brings so much joy.

The steering is lovely, the power immediate and the soundtrack intoxicating, and it's the kind of car that's fun no matter where, how far or how fast you drive it.

In fact, fun seems to be the very centre of the M2 proposition, which definitely doesn't take itself too seriously.

For evidence, look no further than the 'M Drift Analyser', buried in a hopelessly busy multimedia system that will have you praising the CarPlay and Android Auto gods.

It will rate your best drift out of four stars, measure it for distance, and basically give you a pat on the back for doing your best hooligan impression (not on a public road, of course).

Fun, then, is the order of the day here. And I bloody love it.

The BMW M2 hasn't been assessed by ANCAP, but it arrives with six airbags, as well as all your usual traction and braking aids.

Elsewhere, you'll find lane change and lane departure warning, active cruise control, front and rear parking sensors, tyre pressure monitoring, and AEB with pedestrian detection.

There's also blind-spot monitoring, rear cross-traffic alert and lane centring assist, as well as a tyre-pressure monitoring system.

The Alpina B5 is covered by BMW's three-year/unlimited kilometre warranty. Servicing is recommended every 12 months or 15,000km.

The BMW M2 is covered by a five-year, unlimited kilometre warranty, and servicing is 'condition based', in that the vehicle will tell you what maintenance is required, and when.

You can prepay your service costs at the time of purchase for all BMW vehicles, covering the first five years of ownership, for $3480 (which means $695 per service).