Porsche Panamera vs BMW Alpina B5

What's the difference?

While we didn’t get to sample the full breadth of the range, our time in the base Panamera demonstrated that while it’s the most overlooked member of the Porsche family it might also be the most under-rated.

While it may not be the most spacious luxury sedan it does offer ample space and combines it with performance and handling that’s hard to beat. The price drop should help make it a more appealing prospect, although at nearly $200,000 it’s still clearly a premium prospect for a lucky few.

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.

When the second generation Panamera arrived in 2017 it was widely praised for its design. The new model allowed Porsche’s stylists to tidy up the somewhat puffy design of the original whilst still retaining a clear family link to the 911.

For this mid-life update Porsche has only made some minor nip and tucks rather than a major facelift. The changes centre around the front end, where the 'Sport Design' package that was optional is now standard across the range. It has different air intakes and larger side cooling openings for a more dynamic look.

At the rear there’s a new light strip that runs across the boot lid to connect to the LED tail-lights, creating a more seamless appearance. 

The Turbo S also gets a unique front end treatment, to further separate it from the previous Turbo. It gets even larger side air intakes that are connected via a body-coloured horizontal element so it stands out from the rest of the range.

Overall it’s hard to fault Porsche’s decision to not meddle in the design too much. The shape of the Panamera, like a stretched 911 in silhouette, has grown on people over time and the changes they made for the second generation, making it tauter and more athletic in appearance, didn’t need change for the sake of change. 

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.

As the limousine of the Porsche family there’s a big emphasis on space and practicality for the Panamera. But there’s a big difference between a Porsche limo and the rest of the German ‘Big Three’, which is why the Panamera’s closest rivals are the sportier A7/8 Series/CLS and not the bigger A8/7 Series/S-Class. 

The Panamera isn’t small, stretching more than 5.0m in length, but because of its 911-inspired sloping roofline rear headroom is compromised. Adults under 180cm (5' 11") will be comfortable but anyone taller may find their heads bumping the roof.

The Panamera is available as both a four- and five-seater, but in a practical sense it would be hard to carry five. The rear middle seat is technically available with a seatbelt but heavily compromised by the rear air-vents and tray that sit on the transmission tunnel and effectively remove anywhere to put your legs.

On the plus side, the outboard rear seats are excellent sports buckets, so they offer great support when the driver exploits the Panamera’s sporty chassis.

This only applies to the standard wheelbase model, the Executive adds 150mm to its wheelbase which primarily helps create some more rear legroom. But we didn’t get a chance to test that for ourselves on this initial launch drive, so we can’t verify Porsche’s claims.

Those in the front get excellent sports seats across the range, offering lateral support whilst still being comfortable.

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 BMW Alpina B5 lists for $210,000, making it only $10K more the BMW M5 which comes with almost identical features apart from the Alpina engineering to the engine and chassis.

Arriving standard is leather upholstery, four-zone climate control, nav, the Alpina embossed-headrests, a 10.25-inch display, digital radio, Alpina door sills, sunroof, proximity key, power front seats, 12-speaker Harman Kardon stereo, head-up display, Alpina virtual instrument cluster, heated front and rear seats, and the 20-inch Alpina wheels.

The test car I drove had been optioned with a limited-slip differential ($5923), steering-wheel heating ($449); soft-close function for doors ($1150); sunblinds ($1059); TV function ($2065) ambient air package ($575), and front-seat ventilation ($1454).

As mentioned earlier there’s a smorgasbord of powertrains for the Panamera range with a variety of V6 turbo, V8 turbo and hybrid variants of both to choose from.

The entry-level model, known simply as Panamera, gets the 2.9-litre twin-turbo V6 making 243kW/450Nm and paired to an eight-speed dual-clutch transmission and sending drive to the rear-wheels. 

Step up to the Panamera 4, 4 Executive and 4 Sport Turismo and you get the same engine and transmission but all-wheel drive.

The Panamera 4 E-Hybrid range (which includes Executive and Sport Turismo) has the same 2.9-litre twin-turbo V6 but adds a 100kW electric motor. 

That means a combined system output of 340kW/700Nm, driving through the same eight-speed dual-clutch and all-wheel drive system as the non-hybrid variants.

The Panamera 4S E-Hybrid gets an upgraded 17.9kWh battery, replacing the old model’s 14.1kWh version. It also gets a more powerful version of the 2.9-litre V6, tuned to make 324kW, which ups the total output to 412kW/750Nm; again with the eight-speed dual-clutch and all-wheel drive. 

The Panamera GTS uses the brand’s 4.0-litre twin-turbo V8 engine, tuned to make 353kW/620Nm, also with the eight-speed ‘box and all-wheel drive. 

The Turbo S uses the same engine but it gets a new tune to bump performance to 463kW/820Nm; that’s a 59kW/50Nm increase over the old model’s Turbo, hence Porsche’s justification in adding the ‘S’ to this new version.

And if that’s still not enough grunt, the Panamera Turbo S E-Hybrid adds the 100kW electric motor to the 4.0-litre V8 and the combination produces 515kW/870Nm.

Interestingly, despite the extra power and torque, the Turbo S E-Hybrid isn’t the fastest accelerating Panamera. The lighter Turbo S does the 0-100km/h sprint in 3.1 seconds, while the Hybrid takes 3.2 seconds. 

However, the 4S E-Hybrid does manage to out-accelerate the GTS despite using the V6 engine, taking just 3.7 seconds compared to the 3.9 seconds it takes the V8-powered GTS.

But even the entry-level Panamera still does a very rapid 5.6 second 0-100km/h dash, so none of the range can be called slow.

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.

We didn’t get a chance to test all the variants and run the numbers against Porsche’s claims. Again, in an unsurprising development the hugely diverse range of powertrains leads to a wide spread of fuel economy numbers. 

The leader of the pack is the 4 E-Hybrid which uses just 2.6 litres per 100km, according to the company, just ahead of the 4S E-Hybrid with a 2.7L/100km claim. Despite all of its performance the Turbo S E-Hybrid still manages to return a claimed 3.2L/100km.

The entry-level Panamera we spent the majority of the time in uses a claimed 9.2L/100km. The Panamera GTS is the least-efficient, with a claimed 11.7L/100km return, which puts it ahead of the Turbo S and its 11.6L/100km figure.

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.

This is where the Panamera really excels. With every vehicle it builds, Porsche works to make it drive as close to a sports car as possible, even if it's an SUV or, in this case, a large, luxury sedan.

Although Porsche has an extensive range, our test drive was primarily focused on the entry-level model. That’s no bad thing as it’s likely to be the biggest seller in the range, but also because it’s an excellent example of a sports sedan done well.

It may be the first rung on the ladder, but the Panamera doesn’t feel like it's basic or missing anything important. The engine is a gem, the chassis is well sorted and the standard equipment level of Australian models is higher than average.

The 2.9-litre V6 twin-turbo makes a nice noise, a melodious V6 burble, and delivers plenty of punch when needed. Even though it tips the scales at more than 1800kg the V6 with its 450Nm of torque helps punch it out of corners with intent.

The corners is where the Panamera really shines. Even by the highest sports sedan standards the Panamera is a class-leader thanks to all of Porsche’s decades of know-how being poured into its development.

Point the Panamera at a bend and the nose responds with the kind of precision you expect from a sports car. 

The steering provides accuracy and loads of feedback, so you can place the car accurately despite its size. 

You do notice its size and weight as you get into the middle of the corner, but that’s no different from any of its rivals as you can’t fight physics. But for a luxury sports sedan, the Panamera is a star.

To add another layer to its appeal, the Panamera rides with excellent poise and comfort despite its sporting nature. 

Often sports sedans tend to focus too much on handling and stiffer suspension settings at the expense of ride comfort, but Porsche has managed to strike a great balance between the two seemingly opposing characteristics.

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.

The Alpina B5 is based on the BMW 5 Series which had a five-star ANCAP rating awarded to it in 2017.

Along with the comprehensive suite of airbags, traction and stability control, there's an impressive array of advanced safety equipment. Coming standard is AEB (front and rear), evasive steering, front and rear cross-traffic warning, blind-spot alert and lane-keep assist. The Alpina B5 also comes with BMW's emergency call function.

For child seats you'll find two ISOFIX mounts and three top tether points across the rear row.

safety

If you're unfortunate enough to get a flat tyre, there's a puncture repair kit in the boot which works provided the hole isn't giant, as I've experience in the past with these systems.

Service intervals are annually or every 15,000km (whichever comes first) for routine oil changes, with every second year a more significant inspection. 

Prices vary state-to-state due to different labour costs, but as an indication Victorian residents pay $695 for the annual oil change, while the inspection costs $995. 

There are other notable charges you should factor in, including brake fluid every two years for $270, while every four years you need to change spark plugs, transmission oil and air filters which add up to an extra $2129, on top of the $995.

The Panamera is covered by Porsche’s typical three-year warranty/unlimited kilometre, which used to be the industry standard but is increasingly becoming less typical.

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