Diesel is much cheaper here in BC, typically 10-15 cents/liter cheaper and that is for the low sulphur version, regular semi diesel is even cheaper than that.

Diesel is more expensive than petrol in the UK too due to taxation, but the mpg improvements, increased torque and other advantages mean that across all car sales from all marques diesel sells more than 50% of new cars. In the UK we only have ULSD.

I've been driving diesel cars for more than 25 years and they have gone from noisy, dirty and underpowered to quiet, clean and very powerful. 300+ bhp from a 3-litre disel car engine would have been thought unachievable even 5 years ago.

The torque from the 40d is really something and the UK speed limit of 70mph is achieved in 4th - leaving 4 gears still to use. It also achieves more than 30mpg (imperial) with no trouble at all, including city driving.

Thanks for making it even worse LOL - not only does BMW not offer ANY diesel X6 in the States, but 40d is a total utopia "because of regulations".

You know what, aren't UK regulations even stricter than US? Why wouldn't they bring it here and "certify" it? That just means that someone wants to get greased too much. Yeah, I said it! Wanna prove me wrong?:stickpoke

I bet BMW would not regret bringing it here - if only people knew what the car can do:

1. 345 horses
2. 680 Nm (that's slightly over 500 foot-pounds!!!
3. 0-60 = 5.5 secs

xdrive 40d tuning - XBimmers.com | BMW X6 Forum X5 Forum

even more with these guys:

BMW X6 E71 xDrive 40d 306 PS 600 Nm | Diesel Tuning with CHIP Express™
:wow::wow:
That is INSANE! I would LOVE to see what it drives like with proper suspension and wheels

40d is an advance from the 35d but it's not light-years better. Even with the 8-speed tranny it's only another step along the path.

Diesels got a bad rep here in the states and The BMW Superbowl commercial said it best:

YouTube - BMW Advanced Diesel - Changes

No, UK regulations aren't stricter than the US. They are just different. The UK tends to focus on CO emissions, while the US tends to focus on NOx emissions due to the link between NOx and smog. An engine optimized for CO may not be as good on NOx, and vice versa. The US vehicles are using urea injection as post-treatment to control NOx. That will eventually come to the rest of the world, but in general, engine control strategies differ enough that we will see engines certified for one region or the other, but not necessarily both, for some time.

While that may not prove you wrong, it does take away the apparent motivation not to sell the 40d in the US based on kickbacks to executives.

Don't sweat the lack of certification for the 40d. It is older (last generation) technology anyway. The next model will be the triple-turbo 45d 3.0 litre, that will be worth waiting for.

The 40d is the current technology with twin 2-stage turbos on the N57S engine not the engine found in 35d twin or the previous 30d single turbo setup.

Both the 35d and the 40d are sequential bi-turbo arrangements with one bigger and one smaller turbo. The difference between the two is that both turbos of the 35d are fixed geometry whereas the smaller turbo of the 40d is a variable geometry unit while bigger turbo is fixed geometry.

Can't see how 40d could be anything but current generation. As for the triple turbo 3.0 litre diesel, who knows when and if it will appear.

Yeah, it is a bit harsh calling the 40d old technology. It is a modern engine, and the latest that can be purchased at the moment. My apologies if I offended any owners. What I was referring to was that BMW have said they won't be certifying the 40d for the North American market, as they are not investing more money in that platform, but rather spending their development dollars on their next generation of engines, such as the 45d.