Quote:
Originally Posted by Powaup
If you do the conversion for a 428 it works fine so not sure EPA numbers are that different  : |
Hi. BMW(.com) lists the numbers below for the 428. I've converted the least fuel efficient end of all those ranges to miles per gallon (6-spd):
BMW (EU) --------------------- Converted ______ US EPA (6-spd)
Urban: 8.9-8.8 [8.3-8.1] ----- 26.4 MPG ______ 22 (off by 4.4)
Extra-urban: 5.3 [5.3-5.2] --- 44.4 MPG ______ 34 (off by 10.4)
Combined: 6.7-6.6 [6.4-6.3] - 35.1 MPG ______ 26 (off by 9.1)
I personally do not consider these approximately equivalent (results for the automatic are similarly different). And I expect the M3/M4 numbers from the EPA will be similarly different from the EU (BMW.com) numbers. Indeed, given that the EPA and EU use very different testing/regulatory schemes to establish these figures it is impossible that they won't be significantly different, with the EPA numbers always "worse."