The GTI gets better fuel mileage than the 2.5 so you will lose more on mileage than you would save on gas. The gains aren't insignificant on the 2.5 with a chip if you have intake and exhaust which is about $1500 total. But the Rabbit is still slightly slower than a stock GTI. On the upside the 2.5 is significantly more reliable and sounds better than the 2.0t. If you can get the GTI for the same money and it is in good condition, get the GTI. BUUUUUUUTTTT, I like watching motherfuckers get flamed up in this rated x bitch.