Quote Originally Posted by DoktorB
Quote Originally Posted by GERMANIKS
In fairness all those stupid regulations asking manufacturers to reduce C02/NOX etc regularly (Yes we need regulations, but not to an unrealistic level), the technology is simply not there. Yes you can reduce a bit there and there, add a filter up here and down here, but if you look at cars today, they do a little bit better in terms of pollution compared to what they were doing 30 years ago.

My 17 years old 540i designed over 20 years ago does pollute a little bit more than a 2015 M5 with the same engine size. Not that much really.

There is no miracle, run on water, hydrogen, or else to be discovered yet, but petrol/diesel combustion engines doing almost no Co2/Nox emissions, is never going to happen. No way real around it.
However you neglect the point that todays M5 makes nearly twice the power of your 540i whilst producing less emmissions and using half the amount of fuel.

Things have moved on a fair bit.
Well yeah the addition of turbos in petrol engines in recent years at BMW changed a good few things alright, but normally aspirated engines, if you compare them from 10-20 years ago, not much difference in emissions/amount of fuel.

As for the fuel consumption being half of my 540i, you are way too optimistic, see this thread here from M5 owners. These are US figures, so a little bit different from UK. You will be surprised.

In fact exactly same consumption as my 540i. 14 MPG UK in the city and 26 MPG UK on the motorway. I do the same, even 30 MPG at 70 Mph.

http://f10.m5post.com/forums/showthread.php?t=795077