The 2008 Mustang is a best bet in the fun per dollar category. The 4-liter V6 with 210 hp and 240 lb-ft of torque is a comfortable commuter that offers decent performance and fuel economy rated at 17 mpg city/26 mpg highway, while the potent 4.6-liter V8 with 300 hp and 320 lb-ft of torque available in the GT gives far more expensive cars a run for their money. The Mustang GT is the most affordable performance V8 available today.