Due to its greater rear head- and legroom, backseat passengers will be able to stretch out a lot more in the Audi A8 than the Audi S8. As far as headroom and legroom go, there's not much difference between the Audi A8 and the Audi S8 in the front seats.
You'll be making about the same number of stops at the gas station with the Audi A8 as you will with the Audi S8, as they get the same number of miles per tank of gas.
There are a lot of factors to consider when calculating the overall cost of a vehicle. The main consideration is Manufacturer's Suggested Retail Price (MSRP). Based on MSRP, the Audi A8 is clearly a better financial choice over the Audi S8. Another consideration is the Destination Charge, which is a standard charge for transporting the vehicle to the dealer from where it's built. The Audi A8 and the Audi S8 have similar Destination Charges.
The Audi A8 is about the same width as the Audi S8. For some people, bigger is better. If that's the case for you, then you'll be happier with the Audi A8, which is slightly longer than the Audi S8.
With its lower torque, the Audi A8 doesn't do as good a job transmitting power to its wheels as the Audi S8.
The Audi A8 has a larger turning radius than the Audi S8, making it slightly more difficult to maneuver in and out of tight spots.
The Audi A8 has less horsepower than the Audi S8, so it will probably be somewhat slower.
In terms of seating you'll be able to fit the same number of people in both the Audi A8 and the Audi S8. You'll be able to fit about the same amount of groceries into the Audi A8 as you will in the Audi S8.
The Audi A8 comes with essentially the same basic warranty as the Audi S8.
Compare the 2014 Audi A8 and the 2013 Audi S8.
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MSRP*: $75,100 - $135,900
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|Cash Back Rebate:||Up to $2,850||Visit Rebate Center|
|Low APR Loan:||As low as 1.90%||--|
|City MPG:||13 - 24||15|
|Highway MPG:||21 - 36||--|
|Engine(s):||500-hp, 6.3-liter W-12 (premium), V-6, V-8||V-8|
|Seating Capacity:||5 - 5||5 - 5|
|Basic Warranty:||4 years/50,000 miles||4 years/50,000 miles|
|Invoice*:||$69,844 - $126,388||$102,300|
Days on Lot measures the average number of days a model sits on a dealer's lot before it's sold. This is one predictor of a dealer's willingness to negotiate.
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*MSRP and Invoice prices displayed do not include applicable gas taxes or destination charges.