It's fair to say that engines will dominate the driving experience of the Bentayga. Most will want the V8 diesel which generates 435PS, enough to make this the world's fastest diesel SUV, rest to 62mph dispatched in just 4.8s en route to 168mph. Plus there's an awesme 900Nm of torque, so almost nothing will stand in this car's way. The first alternative is a 542bhp 4.0-litre petrol V8. Or, if you prioritise efficiency, there's a turbocharged 3.0-litre V6 petrol Plug-in hybrid model which has an all-electric driving range of 31 miles. Go for the W12 petrol option and you get a 6.0-litre 12 cylinder unit with 608PS and 900Nm of torque. Despite this variant's prodigious 2,422kg kerb weight, 62mph from rest takes just 4.1s - faster than a Porsche 911 Carrera. Flat out, you'll be doing 187mph, a figure way beyond any of its competitors. And you can go faster still by getting the W12 engine in uprated 635PS form in the flagship Bentayga Speed model, which makes 62mph from rest in just 3.9s on the way to 190mph.
On all Bentaygas, to make sure that this big brute doesn't embarrass itself around corners, there's a fast acting 48v electric anti-roll bar system. Unlike conventional fixed anti-roll bars, this allows the Bentayga to remain supple over bumpy roads whilst still resisting roll around the twisties. It also ensures the big Bentley has plenty of ability off the beaten track even if most owners will probably never try it out. There's even the ability to raise and lower the car on its standard air suspension, perfect to make hooking up a horsebox or speedboat that much easier.
Being part of the Volkswagen Audi Group, Bentley was provided with the latest 'MLB-Evo' platform that underpins the second generation Audi Q7 and will go under a variety of other VAG SUVs. There's plenty of aluminium within the structure, along with some composites and good old fashioned steel too. Don't think of this as a bad thing though, Bentley have simply used this as a starting point and thoroughly engineered it for their own purposes. At 5.14 meters long, it's bigger than even a long wheelbase Range Rover, although slightly lower to give a sportier feel.
Step inside and you can really tell why the Bentayga weighs so much despite the high tech chassis. Everywhere you look, there's acres of leather and wood covering every surface imaginable, while if something looks like metal, it will be.
The sweep of the dashboard is said to echo the wings of the Bentley badge and certainly looks very attractive - assuming you've chosen a tasteful colour scheme. Infotainment is taken care of by a smart 8" touchscreen system that delivers a class-leading navigation system along with on-board Wi-Fi for mobile devices and a removable 10.2" Bentley Entertainment Tablet for rear seat passengers.
Bentley describe the Bentayga as the "fastest, most powerful, most luxurious and most exclusive SUV in the world". It should therefore come as no surprise to hear that it'll cost a pretty penny to purchase. The diesel version costs around £136,000, while the standard W12 petrol model is around £163,000. And, as with all Bentleys, this is only the beginning. You can pick between a three person bench or two individual seats in the back with a wide centre console. On the subject of seats, you can even get an' eventer package' with a fold-out bench in the boot. There's also an offroad package, three levels of hi-fi and fully adaptive cruise control with auto brake. Those who really want to push the boat out can opt for the full Mulliner treatment and even a Breitling Tourbillon clock in the dash.
Standard kit includes a panoramic glass roof, electric massage seats, Bluetooth infotainment with sat-nav, plenty of leather and wood, air suspension, climate control and a very bespoke interior feel. Safety features include the usual airbags, ABS, stability control and brake assist. Optional items include a rear crossing traffic warning, road sign recognition and a parking assist system.
If you have to ask yourself whether you can afford to run a Bentayga, don't bother reading any more of this section. Even the V8 diesel can only manage 35.8mpg on the combined cycle and 210g/km, though Bentley points out that this makes this variant the most efficient car it makes. The brand claims a range of 621 miles for this derivative - allowing owners to, for example, drive from London to Verbier, Bordeaux or the Scottish Highlands on a single tank.
With the standard twin turbocharged W12 petrol unit, combined fuel consumption is a lowly 21.6mpg, necessitating a giant 87-litre fuel tank - you certainly wouldn't want to have to fill one up. CO2 is similarly frightening at 296g/km, enough to put it firmly into the top bracket for tax and first licence rates.
You can do much better though, by opting for the 3.0-litre petrol Plug-in hybrid version. This delivers combined NEDC emissions of just 75g/km, has an electric driving range of 31 miles and can be re-charged in just two and a half hours. The three year manufacturer's warranty is an unlimited mileage one.
In summary, you can see why it took the Bentley brand so long to get around to bringing us this car. But having tried it, we've ended up being very glad that they did. Of course, there'll always be people who'll sneer at the concept behind this kind of super-luxury SUV - as one writer put it, 'never again need you be stuck up a creek without a china dinner service'. Still, if you can get over your prejudices and appreciate this model for what it's managed to achieve, there's lots to like here.
Contrary to what some people might tell you, it's very much its own car, very much unique and, best of all, very much a Bentley. Which if you'd like one, will be exactly what you'll want to hear.