The 2005 Mustang GT was all new like the rest of the Mustang range. The Mustang GT came in two options packages: the Deluxe and the Premium. Muscular new engines gave the Mustang stronger performance.
The 4.6-liter all-aluminum V-8 had three-valve heads and was good for 300 horsepower. It had an aluminum block so weight was down 75 pounds versus the prior cast-iron design. Add 40 more horsepower than the 2004 engine and take away that kind of weight and you saw a big improvement in overall performance and not just in a straight line. 0 to 60 mph for the 2005 GT is over in 5.1 seconds and the quarter mile took 13.7 seconds at 103 mph.
