Exactly, PLUS the A8 has a much lower first gear, even with the 3.09. The manuals with 3.9 have close to a 12:1 first gear, but the autos with the 3.09 have close to a 15:1.Every Scat Pack (Charger and Challenger) automatic gets a 3.09.
Every Scat Pack Challenger 6-speed manual gets a 3.90.
The top gear ratio for the A8 is .67 so your overall ratio is 2.07.
The top gear ratio for the M6 is .50 so your overall ratio is 1.95.
This will result in an rpm difference at 70 mph of about 100 rpm with the A8 turning slightly more revs than the M6.
So barely enough to even notice and the 3.09 seems to the perfect overall gear for the A8.
Sent from my SM-N960U using Tapatalk
3.09 = HIGHER3.09 gear is a bit lower gear than the 3.90 gear my 2020 Challenger SP came with. For touring generally a lower gear is "better" in that the engine turns fewer RPMs at any speed. 'course, there is a limit. One doesn't want to have to down shift all the time because the gearing is too low.
The flip side is what to be avoided is too high a gear, like (one vehicle I owned had) 4.56. This was in a 3/4 ton pickup truck. While the thing could haul heavy loads with ease -- once carried a Bridgeport vertically milling machine (>2000 lbs) in it for a friend for over 60 miles -- cruising speed was around 55mph.
If touring use is in the future during the test ride/drive arrange to have the car on the freeway for a few miles at a constant legal speed. Slow to 10mph under the limit then without downshifting accelerate the car like you would during a passing operation. Ideally the car should slow to 10mph under -- without the need to downshift to avoid lugging the engine -- and then confirm the car can accelerate at an acceptable rate -- without the need to downshift -- back up to speed.
Or you can just buy the car on faith. Given the power/torque my 2020 SP has even if the 3.90 was replaced with a 3.09 I believe the car would be really unaffected when touring.
" Tall (high) gears have LOWER numerical numbers such as 2.79, 2.90, 3.00, 3.25. Short (low) gears have HIGHER numerical numbers, such as 4.11, 4.30, 4.56, 4.88, 5.13, 5.36, etc."Sorry, 3.90 is a higher gear ratio than 3.09. I think you're confused that a 3.90 will have a 'lower' top end speed than a 3.09.