Porsche Cayman has a higher mileage than BMW Z4 2.5si, 3.0i And 3.0si?

Searching on the Internet I found that the gas mileage of a Porsche Cayaman (in most European sites, ex: http://www.porsche.com/spain/models/cayman/cayman/featuresandspecs/ ) is rated as 13,8 ltrs/100kms(city) and 6,8 ltrs/100kms (highway) while in the BMW International Website ( http://www.bmw.com/com/en/index_low.html ) you’ll find this figures(for the 3.0si): 12,6 ltrs/100kms (city) and 6,3 ltrs/100kms (urban). The other models, 2.5si, 2.5i are much more “fuel-saving” than the 3.0si. So my question is ¿why does Porsche of USA claims that the Cayman does 23 mpg and 32 mpg (city – hway, respectively) whilst in American/European/Anymarket BMW always claims the same figures: 20 mpg / 30 mpg (or 12.6 ltrs/100kms and 6.3 ltrs/100kms) for the Z4 2.5Si when clearly as seen in the links above the Z4 has better mileage than the Cayman, while in Yahoo! Autos because of the figures given from Porsche USA it seems as if the Cayman has higher mileage? Thanks to the ones responding.

Related Product:

Delonghi TRD0715T Safe Heat Oil-Filled RadiatorBanish the chills this winter with the energy-efficient Safe Heat Oil-Filled Radiator from industry leader, DeLonghi. Solo, the quiet radiator serves ... Read More >

Related Posts

• Should I move closer to my job, even if the rent is about $150 higher than average, to save on fuel costs? Mon 28 Feb 2011
• What would you like to ask?My car's gas mileage has gone down. How can I make it save gas.? Fri 09 Dec 2011
• Do you save gas mileage with tailgate up or down? Mon 28 Nov 2011
• if i do 60 on the freeway will i save on gas than doing 65 which is the speed limit? or would doing 55 be? Thu 24 Nov 2011
• Does turning off traction control in a vehicle save on gas mileage? Mon 31 Oct 2011