
Originally Posted by
KillerQuattro
Your question is specifically about the most power. To address that question directly, a factory Q5 3.0tfsi has 272 horsepower, and the SQ5 has 354 HP. However, with a stage 1 tune, a Q5 will have very close to the same output level as a stage 1 tuned SQ5.. Keep in mind the Q5 S/C cooling will need upgrades beyond Stage 1, where that is not necessarily the case with the SQ5. The SQ5 has a larger cooling capacity overall.
I tend to mod almost all of my cars to include braking upgrades, coil-overs, exhaust, and aesthetic things like the front grill, lighting and wheels. So for me, I could not justify spending the extra cash of an SQ5, when you can make a Q5 S-line perform about the same. I would definitely still need to address the suspension if I had purchased an SQ5.
I have the sport interior package in my Q5 S-line, so I am plenty comfortable in my seats as well.
As mentioned above, there are all sorts of little things in the car that may sway your decision, like steering wheel, diamond stitched seats, quad tip exhaust, etc.
Good luck! Either option, well-equipped, will be a very fun and reliable vehicle I can assure you. Even with the stock tune, the drive-train combo of a Supercharged v6 + the 8-speed ZF trans is a match made in heaven.
The above is a good summary regarding power, assuming you are discussing the B8R 3.0 TFSI supercharged engine and not the newer B9, which is turbocharged and has limited upgrades at this time.
I have a '17 S-Line Q5 with the 3.0 TFSI engine. The engine is the same, but detuned to 272. Stage 1 and Stage 2 tunes pretty much equalize the two engines. At Stage 2 with single pulley 179mm crank pulley I estimate crank hp at around 420-430, about the same as any Stage 2 SQ5 with the same pulley ration.
There is a difference in supercharger cooling. The SQ has more cooling capacity and will run slightly lower IATs at the same high load conditions. Frankly, at my tune level, I probably do need to upgrade cooling, but so would someone with similar mods on an SQ5.
Both use the same ZF8 transmission. There are now transmission ECU upgrades that really increase shift firmness and also permit the transmission to shift at higher rpm. Both cars have factory 6,300 rpm shift redline. But, with a tune and corresponding transmission tune, you can safely raise shift points to 6,900 or maybe 7,000 before getting into cooling problems.
I selected a S-Line Q5 because of the engine. The brakes on the S-Line are 4 pot Brembos in front and are just about as good as the slightly larger rotor 4 pot Brembos on the SQ. The SQ has improved suspension, but that is of less importance to me in a car that will never be used in competition on a road course. I am more concerned with straight line acceleration and highway driving passing power.
FWIW, my S-Line came with the 20" summer tire package, so the larger wheels are available on Q5 models as well, just not standard.
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