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Cruising RPM and MPG A8 vs M7

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Old 09-30-2016, 01:10 AM
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Sprayed 01
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Default Cruising RPM and MPG A8 vs M7

Curious what rpm everyone is turning at lets say 70mph and what your mpg is at that speed doing a long highway cruise.

Post up either trans.

Alex
Old 09-30-2016, 08:00 AM
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javenius
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2015 m7 Z51. 15-1600 rpm at 70 in 7th gear.
Old 09-30-2016, 01:47 PM
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Neil Baker
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Originally Posted by Sprayed 01
Curious what rpm everyone is turning at lets say 70mph and what your mpg is at that speed doing a long highway cruise.

Post up either trans.

Alex
2016 Mn7 Z51 1600 miles....6 hr road trip, 70-74 mph, 29 mpg!! around 1600-1700 rpm, NOT USING ECOM MODE!!

Last edited by Neil Baker; 09-30-2016 at 01:48 PM.
Old 09-30-2016, 01:56 PM
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JoesC5
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Originally Posted by Sprayed 01
Curious what rpm everyone is turning at lets say 70mph and what your mpg is at that speed doing a long highway cruise.

Post up either trans.

Alex
Base or Z51?

They have different gearing(both M7 and A8) so RPMs will vary at any given speed, as will gas mileage.
Old 09-30-2016, 02:06 PM
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jivor
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2017 Grand Sport with "stage II aero"; automatic.

In 8th gear, RPMs are around 1600 at 70-75mph. Instant fuel economy displays 26-30mpg depending on elevation (I live in Florida).
Old 09-30-2016, 03:48 PM
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NSC5
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2016 Z06 A8 (2.41 rear axle ratio)

8th gear @ 75 MPH is 1500 RPM

Averaged 26.2 cruising at 80-82 MPH on return trip from TN this summer which was the best highway average so far. That is with the transmission set to manual to keep from going into V4 mode. I was surprised at how well it does since I didn't buy it for fuel economy but it isn't far behind my 2014 ATS (3.6L RWD) on highway trips and about 3 MPG behind the ATS for overall MPG.

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