Quote:
Originally Posted by JamesNoBrakes
That's probably a sweet spot of aerodynamics and size that you aren't going to easily match elsewhere. 42mpg would be unheard of unless maybe it's imperial mpg, but even then that seems highly unlikely given that drag goes up as the square of velocity.
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We're talking about Diesel, they have a lot more mpg (and Diesel itself is cheaper as well, at least in most of Europe). I had an 840d xDrive Coupé and averaged 5.8l/100km (40mpg) when driving at 120km/h (75mph). At 110mph it probably would be around 7.5l/100km (31mpg). And the 8 is quite a lot heavier than a 3/4 series. Overall I was at 6.4l/100km (37mpg).
My M550d F11 will consume about 8.5l/100km at 110mph and that one has 200k km on the clock.
I think the G20 is one of the best cars regarding cw value. Even better than the Model 3. I would go with the before mentioned M550d or a M340d.