Jaguar XF vs BMW Alpina B7

What's the difference?

With that iron fist wrapped in a velvet glove wrapped in bubble wrap engine, excellent ride and gorgeous looks, the XF Sportbrake ticks all the boxes. Apart from the entry price and options prices, there are few objective reasons not to buy the car. It's just as good as any of its German competition and arguably the prettiest of the lot.

Should Jaguar have taken the dive? Given the XF Sportbrake is a luxury wagon done right, yes.

The BMW Alpina B7 is a special car destined (like all Alpinas) to be a collector's item, due to its rarity and exclusivity. I asked Alpina just how many current model B7s there are in Australia and the answer was "less than five", which is just as mysterious as most people find the car in general.

The B7 is fast – too fast to enjoy legally on Australian roads – but it is also supremely comfortable and well appointed. For Alpina fans lucky enough to be driven in on,e this would make for a truly rare and niche way to be chauffeured.

The second-generation XF is a very pretty car. A few carmakers have a had a crack at that four-door coupe idea, but Jaguar's Ian Callum got it right first go. You might expect the wagon to be a bit dumpy but it's far from it. That's not to say wagons can't be good looking - many are better-looking than the car they're based on (the weirdly proportioned Golf wagon being the exception to the rule). The XF sedan just looks right.

Anyway, the Sportbrake is basically the same until behind the B-pillar, with the roof continuing on to steeply raked tailgate glass. Obviously the lights are different back there but it's a nicely integrated job, it doesn't look like a dodgy extension. Rolling on the optional 20-inch wheels it looks amazing - low, long and well-proportioned. Unfortunately, it's more than vaguely hearse-like in black (the only First Edition colour).

Inside is standard XF, with the obvious exception of the rear seats and the big open load area. With this First Edition's glass roof the cabin seems infinite. Either way it's big and comfortable, although fit and finish could be a bit tighter.

This is a good place to start because the B7 looks just like the 750Li it's based on, until you see the first tell-tale signs that it's not one.

There's the front wing with Alpina lettering and the boot-top spoiler, the graphics, which run the length of the car, and the 20-spoke wheels with Alpina badging.

This is late '70s, early '80s styling at its best (and possibly worst), but these special cars can pull off the irony-free look because this is how Alpina BMWs have rolled since 1975, when the E21 320-based Alpina A1/3 was launched.

BMW badges have been left on the bonnet and boot, but there's Alpina B7 BiTurbo lettering in place of the 7 Series identifier.

Most people walked by it in the street thinking it was just a big BMW, others scratched their heads wondering what I'd done to my big German limo and a handful almost dropped to their knees in praise and wonderment at spotting a rare beast like this in the wild.

These people all had their own Alpina stories – one was the third generation of an Alpina-owning family. You become a member a small and passionate club when you buy into this rarefied brand.

The standard B7's cabin is close to identical to the luxurious interior of the 750Li, save for Alpina-embossed stitching in the headrests of the soft, leather seats, the virtual instrument cluster and the Alpina plaque on the centre console denoting the build number.

The B7 is long, low and wide at just under 5.3m end to end, 1.5m tall and 1.9m across. A 3.2m wheelbase means cabin room is more than just spacious.

The B7 rolls off the Dingolfing production line in Germany and is then handed over to Alpina's facility in Buckle, where significant changes take place. Read on to find out how the B7 is different from a regular 750Li.

Front and rear passengers enjoy plenty of space. Storage includes a not-quite-big-enough-for-a-phone tray ahead of the rotary dial gear selector and a pair of cupholders. Those in the rear have plenty of space, except for the middle seat occupant who must straddle a stout transmission tunnel. The rear armrest holds a pair of cupholders and the doors have slim pockets.

The boot holds 565 litres with the seats in place and "up to" 1700 litres with the seats down - that latter figure does not feel like a VDA number.

The B7 is a five-seater limousine although with the fold-down rear centre armrest which houses the media control panel the back is really set up to carry two.

That 3.2m wheelbase means cabin space is enormous. At 191cm tall I can sit behind my driving position with about 30cm between my knees and the seatback. Those rear doors open wide and the entrance is huge, making entry and exit almost as easy as just walking through a doorway. The air suspension also rises and lowers the B7's ride height for better access.

Storage is excellent, with two cupholders and door pockets for rear passengers, along with the area inside the centre armrest.

Up front, the driver and co-pilot have a deep centre console storage bin with split-opening lid, two cupholders and door pockets.

Luggage space is good, with a 515-litre boot.

The B7 lists for $389,955, while a 750li is about $319,000. At this level, $70K seems like a downright reasonable premium to pay for a faster, more powerful, better handling and comfier version of the 750Li.

In this case you're paying more but getting more, although standard features are close to identical. There's adaptive LED headlights, head-up display, night vision with pedestrian detection, a 10.25-inch touch screen up front and two screens in the second row for TV and other media functions.

There's a reversing camera, sat nav, harman/kardon surround stereo and Apple CarPlay. There's leather upholstery, seat massagers in the front and rear, four-zone climate control, heated and ventilated front and rear seats, front and rear parking sensors, auto tailgate, sunblinds for the rear and rear-side windows and proximity key.

The safety features are listed in the section below, and that list is also impressive.

Rivals to the B7 include the Mercedes-AMG S63, which lists for $375,000, the $331,700 Audi S8 and even the Bentley Flying Spur, which almost matches its price at $389,500.

The First Edition ships with Jaguar's 3.0-litre twin-turbo diesel V6. Good for 221kW and a prodigious 700Nm, power heads to the rear wheels via an eight-speed ZF automatic.

With all that power and torque, the XF Sportbrake cracks 100km/h from rest in 6.6 seconds.

The air suspension means you can tow up to 2000kg with a braked trailer.

Alpina takes the 4.4-litre twin turbo V8 from the BMW 750Li and rebuilds the engine by hand. Alpina fits its own turbochargers, air-intake set -up, high-capacity cooling system and Akrapovic quad exhaust. Output is 447kW and 800Nm – an increase of a whopping 117kW and 150Nm over the 750Li's grunt.

It's interesting to note that the V12-powered 760Li has a smidge more power, at 448kW, and the same torque output as the B7.

How fast is the B7? Supercar fast – the B7 has a top speed of 330km/h, which will see it outrun a McLaren 570 and almost keep up with a Ferrari F12. That's quite incredible for a 2.3-tonne limousine with three TVs on board. A 0-100km/h time of 4.2 seconds is also hugely impressive.

In comparison, a 750Li has a 0-100km/h time of a not-too-shabby 4.7 seconds, but the car is electronically limited to 250km/h.

An eight-speed automatic transmission shifts gears smoothly, although a little slowly in Normal mode, while Sport and Sport+ add urgency and harder shifts.

Finally, the B7 is all-wheel drive, and those rear wheels are designed to steer slightly for better cornering performance.

Jaguar claims a combined-cycle figure of 5.9L/100km. Our time with it was mostly shuttling around the suburbs with a couple of highway runs and we managed a respectable 8.3L/100km.

The B7 is probably not the car to own if you're concerned about either fuel prices or emissions, but then the twin-turbo V8 may not be as thirsty as you'd think, with Alpina stating that, after a combination of urban and open-road driving, you should only use 9.6L/100km.

My time in the B7 saw me double that usage but this could have had something to do with me turning off the stop-start system and driving in Sport mode constantly.

There's no getting away from the size and heft of the Sportbrake. Where a four-cylinder sedan comes in under 1600kg - not bad for an almost five-metre-long car - up here at the top it's well over 1800kg. With big wheels and a long wheelbase it's not going to win any wards for manoeuvrability, with a big turning circle and a length that's challenging to shopping centre car parks.

The 3.0 V6 twin-turbo is a fantastic unit. It can be a bit noisy when cold but it's super smooth and with all that torque it crushes overtaking with little need for advanced planning. The Sportbrake wafts along, lazily turning over in traffic and keeping the vibe calm.

Despite those big wheels, the ride is excellent. Even when in Sport mode, it's a rare bump or surface that will cause drama. It's very comfortable and very quiet, almost to the level of the XJ limo.

If you do fancy a bit of amusement, the V6 and well-sorted chassis are ready to play. In reality, Sport mode is where both myself and my wife left the car the whole time we had it. Both of us found the steering a little too light and preferred the more lively throttle response. The XF features torque vectoring using the brakes and coupled with a well-judged stability and traction control system, it delivers a good impression of a sporty sedan.

But the XF is best when you keep it relaxed. Both in town and in the cruise, it's a lovely, quiet place to be and a relaxing, undemanding drive. 

Only a couple of things were annoying - the light steering we've already covered. The heated windscreen was more reflection-prone so the head-up display could be hard to see in some lighting conditions. And sometimes it beeped for no apparent reason, which I eventually traced to the blind-spot warning.

Who on Earth thinks a BMW 750Li isn't fast enough or comfortable enough, even with all its horsepower, luxurious cabin and technology? Alpina, that's who.

Redevelopment of the 4.4-litre V8 with new turbochargers, a high-capacity cooling system, different air suspension set-up and an exhaust system made by Akrapovic have made this already exceptional car better. Better to drive and better to be driven in.

The ride, even on those 21-inch wheels and low-profile Michelin Pilot Super Sport tyres (255/35 ZR21 on the front and 295/30 ZR 21 on the rear) is incredibly comfortable. I drove it and also had a chance to recline in the back and be chauffeured (by our photographer) and the ride was so composed and refined it was hard to believe I was travelling along some truly awful urban roads with their cracked and pot-holed surfaces.

And it's quiet, too. Which will suit those in the back being transported swiftly from the airport to their next meeting, but if you're after a loud and angry exhaust note then you won't find it in the B7. Sure, from the outside at full throttle the B7 has a menacing growl, but this isn't a BMW M car that will bark and snarl. 
See, while BMW's M division makes brutal, loud, high-performance versions of their regular cars, Alpina makes comfortable, stealthy, high-performance ones.

All-wheel drive provides fantastic traction and ensures that grunt doesn't just tear the tyres off those rims when you sneeze on the throttle.

And while the air-suspension is soft and comfortable, adaptive dampers adjust for when the road goes twisty, providing impressive handling for a heavy and long car.

Really, though, the B7 is built for long, endless stretches of roads, and the acceleration beyond 100km/h is almost as startling as that from 0-100km/h, as it wants to push straight past 200km/h towards that 330km/h top speed.

Which, unless you know a good lawyer or happen to be one, will send you straight to jail. Yes, the B7 is probably too much car for Australian roads. Only on a German autobahn would a B7 be fully at home.

I felt like I was given a Melbourne Cup-winning racehorse for a week but could only ride it in my suburban backyard.

The Alpina B7 comes with all of the BMW 750Li's safety equipment – this includes AEB, lane-keeping assistance and lane-departure warning, blind-spot warning, active cruise control, night vision with object recognition, auto parking and surround view camera.

Along with the suite of airbags, there's traction and stability control and ABS, as you'd expect.

The 750Li and B7 have not been given an ANCAP score.

Jaguars are offered with a three-year/100,000km warranty with a matching roadside-assist package. You can purchase a five-year/130,000km service plan for an oddly reasonable $2200. Even more reasonable are the service intervals - 12 months or 26,000km (!).

The B7 is covered by BMW's three-year, unlimited-kilometre warranty. Servicing is recommended every 12 months or 15,000km. The B7 is covered by BMW special vehicles servicing plan, which means services are cost-free for the first three years of the car's life.