Sorry just missed your last post
Please keep in mind with Pricing that the TSX doesn't offer options. It comes fully equipped as a base model. It comes with VSC and all the various options like moon roof, leather, deluxe stereo etc with the base package.
Ok with the engines.
Honda Engines never use Turbos
Here is the comparison
1.8 Liter Turbo vs 2.4 Liter N/A
The 1.8t offers 170hp and the 2.4 gives you 200 hp.
They both offer 22/31 for gas mileage
The Torque Output on both motors is 166ft lbs but the Audi makes the power sooner because it's not designed to wind out like the Honda is. I prefer the Honda because it's got plenty of power and is capable of provind alot more ummpf in spirited driving.
Quite honestly I think that you would be happy with either of these cars. They are both really nice vehicles. I would check out the 325i before I made my final decision though