I drove a VW GTI back to back with the R32. No comparison IMHO. While the Turbo 4 is fast off the line, it does not have the smooth, turbine like power of the NA 6 cylinder. As far as mileage, I can get 30 mpg with my Z4 cruising at 60-65. The R32 revs higher in 6th gear so mileage is lower, about 25-26 at 60 mph.
There is no smoother engine than an I6 and I sure hope BMW never abandons this configuration.
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Colonel (Retired), US Army/Hagerstown, MD
2016 518ixdrive/MSport AW/Ivory White
ED-01-10 2010 Z4s30i AW/Beige/Burl/ 6MT/SP/PP/CWP/NAV/ipod/USB/CA (retired)
2011 335d BS/Oyster/PP/CWP/NAV/ipod/USB(Daily Driver) 30+ mpg (retired)
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